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Finding the Fourth Proportional to 638.98, 881.55 and 373.39

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Solution

The fourth proportional to 638.98, 881.55 and 373.39 is: 515.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.98 : 881.55 = 373.39 : x
  2. Step 2: Convert to fraction form
    638.98/881.55 = 373.39/x
  3. Step 3: Cross multiply
    638.98x = 881.55 × 373.39
  4. Step 4: Simplify right side
    638.98x = 329,161.95
  5. Step 5: Solve for x
    x = 329,161.95/638.98
  6. Step 6: Final answer
    x = 515.14

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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.