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Finding the Fourth Proportional to 387,154.50, 534,358.53 and 215,131.47

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Solution

The fourth proportional to 387,154.50, 534,358.53 and 215,131.47 is: 296,928.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,154.50 : 534,358.53 = 215,131.47 : x
  2. Step 2: Convert to fraction form
    387,154.50/534,358.53 = 215,131.47/x
  3. Step 3: Cross multiply
    387,154.50x = 534,358.53 × 215,131.47
  4. Step 4: Simplify right side
    387,154.50x = 114,957,336,065.94
  5. Step 5: Solve for x
    x = 114,957,336,065.94/387,154.50
  6. Step 6: Final answer
    x = 296,928.84

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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.