Home / 808,801.20-1,213,201.80-509,619.60

Finding the Fourth Proportional to 808,801.20, 1,213,201.80 and 509,619.60

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Solution

The fourth proportional to 808,801.20, 1,213,201.80 and 509,619.60 is: 764,429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,801.20 : 1,213,201.80 = 509,619.60 : x
  2. Step 2: Convert to fraction form
    808,801.20/1,213,201.80 = 509,619.60/x
  3. Step 3: Cross multiply
    808,801.20x = 1,213,201.80 × 509,619.60
  4. Step 4: Simplify right side
    808,801.20x = 618,271,416,035.28
  5. Step 5: Solve for x
    x = 618,271,416,035.28/808,801.20
  6. Step 6: Final answer
    x = 764,429.40

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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.