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Finding the Fourth Proportional to 280,937.92, 387,695.61 and 153,613.41

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Solution

The fourth proportional to 280,937.92, 387,695.61 and 153,613.41 is: 211,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,937.92 : 387,695.61 = 153,613.41 : x
  2. Step 2: Convert to fraction form
    280,937.92/387,695.61 = 153,613.41/x
  3. Step 3: Cross multiply
    280,937.92x = 387,695.61 × 153,613.41
  4. Step 4: Simplify right side
    280,937.92x = 59,555,244,694.13
  5. Step 5: Solve for x
    x = 59,555,244,694.13/280,937.92
  6. Step 6: Final answer
    x = 211,987.21

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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.