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Finding the Fourth Proportional to 994.85, 1,373.08 and 658.76

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Solution

The fourth proportional to 994.85, 1,373.08 and 658.76 is: 909.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.85 : 1,373.08 = 658.76 : x
  2. Step 2: Convert to fraction form
    994.85/1,373.08 = 658.76/x
  3. Step 3: Cross multiply
    994.85x = 1,373.08 × 658.76
  4. Step 4: Simplify right side
    994.85x = 904,520.02
  5. Step 5: Solve for x
    x = 904,520.02/994.85
  6. Step 6: Final answer
    x = 909.21

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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.