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Finding the Fourth Proportional to 387,595.48, 534,926.12 and 215,530.60

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Solution

The fourth proportional to 387,595.48, 534,926.12 and 215,530.60 is: 297,456.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,595.48 : 534,926.12 = 215,530.60 : x
  2. Step 2: Convert to fraction form
    387,595.48/534,926.12 = 215,530.60/x
  3. Step 3: Cross multiply
    387,595.48x = 534,926.12 × 215,530.60
  4. Step 4: Simplify right side
    387,595.48x = 115,292,947,599.27
  5. Step 5: Solve for x
    x = 115,292,947,599.27/387,595.48
  6. Step 6: Final answer
    x = 297,456.89

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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.