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Finding the Fourth Proportional to 386,791.74, 580,569.45 and 290,393.68

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Solution

The fourth proportional to 386,791.74, 580,569.45 and 290,393.68 is: 435,877.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,791.74 : 580,569.45 = 290,393.68 : x
  2. Step 2: Convert to fraction form
    386,791.74/580,569.45 = 290,393.68/x
  3. Step 3: Cross multiply
    386,791.74x = 580,569.45 × 290,393.68
  4. Step 4: Simplify right side
    386,791.74x = 168,593,696,404.91
  5. Step 5: Solve for x
    x = 168,593,696,404.91/386,791.74
  6. Step 6: Final answer
    x = 435,877.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.