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Finding the Fourth Proportional to 387,117.52, 534,231.90 and 215,027.24

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Solution

The fourth proportional to 387,117.52, 534,231.90 and 215,027.24 is: 296,742.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,117.52 : 534,231.90 = 215,027.24 : x
  2. Step 2: Convert to fraction form
    387,117.52/534,231.90 = 215,027.24/x
  3. Step 3: Cross multiply
    387,117.52x = 534,231.90 × 215,027.24
  4. Step 4: Simplify right side
    387,117.52x = 114,874,408,305.80
  5. Step 5: Solve for x
    x = 114,874,408,305.80/387,117.52
  6. Step 6: Final answer
    x = 296,742.99

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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.