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Finding the Fourth Proportional to 681,431.61, 940,373.68 and 375,507.91

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Solution

The fourth proportional to 681,431.61, 940,373.68 and 375,507.91 is: 518,199.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,431.61 : 940,373.68 = 375,507.91 : x
  2. Step 2: Convert to fraction form
    681,431.61/940,373.68 = 375,507.91/x
  3. Step 3: Cross multiply
    681,431.61x = 940,373.68 × 375,507.91
  4. Step 4: Simplify right side
    681,431.61x = 353,117,756,473.97
  5. Step 5: Solve for x
    x = 353,117,756,473.97/681,431.61
  6. Step 6: Final answer
    x = 518,199.85

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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.