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Finding the Fourth Proportional to 681,138.78, 940,045.35 and 375,246.50

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Solution

The fourth proportional to 681,138.78, 940,045.35 and 375,246.50 is: 517,880.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,138.78 : 940,045.35 = 375,246.50 : x
  2. Step 2: Convert to fraction form
    681,138.78/940,045.35 = 375,246.50/x
  3. Step 3: Cross multiply
    681,138.78x = 940,045.35 × 375,246.50
  4. Step 4: Simplify right side
    681,138.78x = 352,748,729,778.89
  5. Step 5: Solve for x
    x = 352,748,729,778.89/681,138.78
  6. Step 6: Final answer
    x = 517,880.85

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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.