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Finding the Fourth Proportional to 387,307.88, 534,534.90 and 217,542

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Solution

The fourth proportional to 387,307.88, 534,534.90 and 217,542 is: 300,236.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,307.88 : 534,534.90 = 217,542 : x
  2. Step 2: Convert to fraction form
    387,307.88/534,534.90 = 217,542/x
  3. Step 3: Cross multiply
    387,307.88x = 534,534.90 × 217,542
  4. Step 4: Simplify right side
    387,307.88x = 116,283,791,215.80
  5. Step 5: Solve for x
    x = 116,283,791,215.80/387,307.88
  6. Step 6: Final answer
    x = 300,236.06

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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.