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Finding the Fourth Proportional to 681,732.18, 940,790.28 and 375,813.60

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Solution

The fourth proportional to 681,732.18, 940,790.28 and 375,813.60 is: 518,622.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,732.18 : 940,790.28 = 375,813.60 : x
  2. Step 2: Convert to fraction form
    681,732.18/940,790.28 = 375,813.60/x
  3. Step 3: Cross multiply
    681,732.18x = 940,790.28 × 375,813.60
  4. Step 4: Simplify right side
    681,732.18x = 353,561,781,971.81
  5. Step 5: Solve for x
    x = 353,561,781,971.81/681,732.18
  6. Step 6: Final answer
    x = 518,622.70

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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.