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Finding the Fourth Proportional to 387,630.12, 534,909.24 and 215,559.12

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Solution

The fourth proportional to 387,630.12, 534,909.24 and 215,559.12 is: 297,460.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,630.12 : 534,909.24 = 215,559.12 : x
  2. Step 2: Convert to fraction form
    387,630.12/534,909.24 = 215,559.12/x
  3. Step 3: Cross multiply
    387,630.12x = 534,909.24 × 215,559.12
  4. Step 4: Simplify right side
    387,630.12x = 115,304,565,054.27
  5. Step 5: Solve for x
    x = 115,304,565,054.27/387,630.12
  6. Step 6: Final answer
    x = 297,460.28

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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.