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Finding the Fourth Proportional to 638.79, 962.79 and 632.61

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Solution

The fourth proportional to 638.79, 962.79 and 632.61 is: 953.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.79 : 962.79 = 632.61 : x
  2. Step 2: Convert to fraction form
    638.79/962.79 = 632.61/x
  3. Step 3: Cross multiply
    638.79x = 962.79 × 632.61
  4. Step 4: Simplify right side
    638.79x = 609,068.21
  5. Step 5: Solve for x
    x = 609,068.21/638.79
  6. Step 6: Final answer
    x = 953.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.