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Finding the Fourth Proportional to 280,356.72, 386,834.52 and 161,101.68

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Solution

The fourth proportional to 280,356.72, 386,834.52 and 161,101.68 is: 222,287.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,356.72 : 386,834.52 = 161,101.68 : x
  2. Step 2: Convert to fraction form
    280,356.72/386,834.52 = 161,101.68/x
  3. Step 3: Cross multiply
    280,356.72x = 386,834.52 × 161,101.68
  4. Step 4: Simplify right side
    280,356.72x = 62,319,691,053.99
  5. Step 5: Solve for x
    x = 62,319,691,053.99/280,356.72
  6. Step 6: Final answer
    x = 222,287.13

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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.