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Finding the Fourth Proportional to 681,574.42, 940,591.61 and 391,210.89

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Solution

The fourth proportional to 681,574.42, 940,591.61 and 391,210.89 is: 539,881.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,574.42 : 940,591.61 = 391,210.89 : x
  2. Step 2: Convert to fraction form
    681,574.42/940,591.61 = 391,210.89/x
  3. Step 3: Cross multiply
    681,574.42x = 940,591.61 × 391,210.89
  4. Step 4: Simplify right side
    681,574.42x = 367,969,680,874.63
  5. Step 5: Solve for x
    x = 367,969,680,874.63/681,574.42
  6. Step 6: Final answer
    x = 539,881.88

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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.