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Finding the Fourth Proportional to 387,078.39, 534,150.39 and 215,007.27

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Solution

The fourth proportional to 387,078.39, 534,150.39 and 215,007.27 is: 296,700.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,078.39 : 534,150.39 = 215,007.27 : x
  2. Step 2: Convert to fraction form
    387,078.39/534,150.39 = 215,007.27/x
  3. Step 3: Cross multiply
    387,078.39x = 534,150.39 × 215,007.27
  4. Step 4: Simplify right side
    387,078.39x = 114,846,217,123.34
  5. Step 5: Solve for x
    x = 114,846,217,123.34/387,078.39
  6. Step 6: Final answer
    x = 296,700.15

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1.5x scale

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.