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Finding the Fourth Proportional to 638.37, 881.15 and 592.20

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Solution

The fourth proportional to 638.37, 881.15 and 592.20 is: 817.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.37 : 881.15 = 592.20 : x
  2. Step 2: Convert to fraction form
    638.37/881.15 = 592.20/x
  3. Step 3: Cross multiply
    638.37x = 881.15 × 592.20
  4. Step 4: Simplify right side
    638.37x = 521,814.07
  5. Step 5: Solve for x
    x = 521,814.07/638.37
  6. Step 6: Final answer
    x = 817.42

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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.