Home / 1,206,405,931.20-1,809,608,896.80-430,076,918.40

Finding the Fourth Proportional to 1,206,405,931.20, 1,809,608,896.80 and 430,076,918.40

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Solution

The fourth proportional to 1,206,405,931.20, 1,809,608,896.80 and 430,076,918.40 is: 645,115,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206,405,931.20 : 1,809,608,896.80 = 430,076,918.40 : x
  2. Step 2: Convert to fraction form
    1,206,405,931.20/1,809,608,896.80 = 430,076,918.40/x
  3. Step 3: Cross multiply
    1,206,405,931.20x = 1,809,608,896.80 × 430,076,918.40
  4. Step 4: Simplify right side
    1,206,405,931.20x = 778,271,017,844,967,552
  5. Step 5: Solve for x
    x = 778,271,017,844,967,552/1,206,405,931.20
  6. Step 6: Final answer
    x = 645,115,377.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.