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Finding the Fourth Proportional to 668,851.47, 922,713.66 and 396,930.83

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Solution

The fourth proportional to 668,851.47, 922,713.66 and 396,930.83 is: 547,585.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,851.47 : 922,713.66 = 396,930.83 : x
  2. Step 2: Convert to fraction form
    668,851.47/922,713.66 = 396,930.83/x
  3. Step 3: Cross multiply
    668,851.47x = 922,713.66 × 396,930.83
  4. Step 4: Simplify right side
    668,851.47x = 366,253,494,302.57
  5. Step 5: Solve for x
    x = 366,253,494,302.57/668,851.47
  6. Step 6: Final answer
    x = 547,585.69

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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.