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Finding the Fourth Proportional to 681,420.78, 940,366.98 and 375,508.10

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Solution

The fourth proportional to 681,420.78, 940,366.98 and 375,508.10 is: 518,204.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,420.78 : 940,366.98 = 375,508.10 : x
  2. Step 2: Convert to fraction form
    681,420.78/940,366.98 = 375,508.10/x
  3. Step 3: Cross multiply
    681,420.78x = 940,366.98 × 375,508.10
  4. Step 4: Simplify right side
    681,420.78x = 353,115,420,313.46
  5. Step 5: Solve for x
    x = 353,115,420,313.46/681,420.78
  6. Step 6: Final answer
    x = 518,204.66

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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.