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Finding the Fourth Proportional to 521,697.92, 718,331.09 and 407,438.10

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Solution

The fourth proportional to 521,697.92, 718,331.09 and 407,438.10 is: 561,005.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,697.92 : 718,331.09 = 407,438.10 : x
  2. Step 2: Convert to fraction form
    521,697.92/718,331.09 = 407,438.10/x
  3. Step 3: Cross multiply
    521,697.92x = 718,331.09 × 407,438.10
  4. Step 4: Simplify right side
    521,697.92x = 292,675,452,443.34
  5. Step 5: Solve for x
    x = 292,675,452,443.34/521,697.92
  6. Step 6: Final answer
    x = 561,005.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.