Home / 1,320,121.20-1,980,181.80-433,657.20

Finding the Fourth Proportional to 1,320,121.20, 1,980,181.80 and 433,657.20

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Solution

The fourth proportional to 1,320,121.20, 1,980,181.80 and 433,657.20 is: 650,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,121.20 : 1,980,181.80 = 433,657.20 : x
  2. Step 2: Convert to fraction form
    1,320,121.20/1,980,181.80 = 433,657.20/x
  3. Step 3: Cross multiply
    1,320,121.20x = 1,980,181.80 × 433,657.20
  4. Step 4: Simplify right side
    1,320,121.20x = 858,720,094,878.96
  5. Step 5: Solve for x
    x = 858,720,094,878.96/1,320,121.20
  6. Step 6: Final answer
    x = 650,485.80

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Half scale
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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.