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Finding the Fourth Proportional to 638.93, 881.81 and 373.46

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Solution

The fourth proportional to 638.93, 881.81 and 373.46 is: 515.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.93 : 881.81 = 373.46 : x
  2. Step 2: Convert to fraction form
    638.93/881.81 = 373.46/x
  3. Step 3: Cross multiply
    638.93x = 881.81 × 373.46
  4. Step 4: Simplify right side
    638.93x = 329,317.29
  5. Step 5: Solve for x
    x = 329,317.29/638.93
  6. Step 6: Final answer
    x = 515.42

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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.