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Finding the Fourth Proportional to 681,165, 940,036.86 and 379,359

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Solution

The fourth proportional to 681,165, 940,036.86 and 379,359 is: 523,531.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,165 : 940,036.86 = 379,359 : x
  2. Step 2: Convert to fraction form
    681,165/940,036.86 = 379,359/x
  3. Step 3: Cross multiply
    681,165x = 940,036.86 × 379,359
  4. Step 4: Simplify right side
    681,165x = 356,611,443,172.74
  5. Step 5: Solve for x
    x = 356,611,443,172.74/681,165
  6. Step 6: Final answer
    x = 523,531.66

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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.