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Finding the Fourth Proportional to 521,998.40, 782,997.60 and 417,022.40

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Solution

The fourth proportional to 521,998.40, 782,997.60 and 417,022.40 is: 625,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,998.40 : 782,997.60 = 417,022.40 : x
  2. Step 2: Convert to fraction form
    521,998.40/782,997.60 = 417,022.40/x
  3. Step 3: Cross multiply
    521,998.40x = 782,997.60 × 417,022.40
  4. Step 4: Simplify right side
    521,998.40x = 326,527,538,346.24
  5. Step 5: Solve for x
    x = 326,527,538,346.24/521,998.40
  6. Step 6: Final answer
    x = 625,533.60

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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.