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Finding the Fourth Proportional to 681,153.28, 940,020.68 and 379,347.28

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Solution

The fourth proportional to 681,153.28, 940,020.68 and 379,347.28 is: 523,515.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,153.28 : 940,020.68 = 379,347.28 : x
  2. Step 2: Convert to fraction form
    681,153.28/940,020.68 = 379,347.28/x
  3. Step 3: Cross multiply
    681,153.28x = 940,020.68 × 379,347.28
  4. Step 4: Simplify right side
    681,153.28x = 356,594,288,101.75
  5. Step 5: Solve for x
    x = 356,594,288,101.75/681,153.28
  6. Step 6: Final answer
    x = 523,515.48

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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.