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Finding the Fourth Proportional to 539,129.60, 808,694.40 and 486,641.60

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Solution

The fourth proportional to 539,129.60, 808,694.40 and 486,641.60 is: 729,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,129.60 : 808,694.40 = 486,641.60 : x
  2. Step 2: Convert to fraction form
    539,129.60/808,694.40 = 486,641.60/x
  3. Step 3: Cross multiply
    539,129.60x = 808,694.40 × 486,641.60
  4. Step 4: Simplify right side
    539,129.60x = 393,544,336,727.04
  5. Step 5: Solve for x
    x = 393,544,336,727.04/539,129.60
  6. Step 6: Final answer
    x = 729,962.40

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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.