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Finding the Fourth Proportional to 387,408.39, 534,666.95 and 234,530.88

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Solution

The fourth proportional to 387,408.39, 534,666.95 and 234,530.88 is: 323,678.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,408.39 : 534,666.95 = 234,530.88 : x
  2. Step 2: Convert to fraction form
    387,408.39/534,666.95 = 234,530.88/x
  3. Step 3: Cross multiply
    387,408.39x = 534,666.95 × 234,530.88
  4. Step 4: Simplify right side
    387,408.39x = 125,395,910,290.42
  5. Step 5: Solve for x
    x = 125,395,910,290.42/387,408.39
  6. Step 6: Final answer
    x = 323,678.87

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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.