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Finding the Fourth Proportional to 521,215.40, 718,906.46 and 478,333.38

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Solution

The fourth proportional to 521,215.40, 718,906.46 and 478,333.38 is: 659,759.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,215.40 : 718,906.46 = 478,333.38 : x
  2. Step 2: Convert to fraction form
    521,215.40/718,906.46 = 478,333.38/x
  3. Step 3: Cross multiply
    521,215.40x = 718,906.46 × 478,333.38
  4. Step 4: Simplify right side
    521,215.40x = 343,876,956,915.64
  5. Step 5: Solve for x
    x = 343,876,956,915.64/521,215.40
  6. Step 6: Final answer
    x = 659,759.78

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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.