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Finding the Fourth Proportional to 672.98, 1,013.72 and 631.98

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Solution

The fourth proportional to 672.98, 1,013.72 and 631.98 is: 951.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.98 : 1,013.72 = 631.98 : x
  2. Step 2: Convert to fraction form
    672.98/1,013.72 = 631.98/x
  3. Step 3: Cross multiply
    672.98x = 1,013.72 × 631.98
  4. Step 4: Simplify right side
    672.98x = 640,647.61
  5. Step 5: Solve for x
    x = 640,647.61/672.98
  6. Step 6: Final answer
    x = 951.96

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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.