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Finding the Fourth Proportional to 842.02, 1,261.49 and 658.52

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Solution

The fourth proportional to 842.02, 1,261.49 and 658.52 is: 986.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.02 : 1,261.49 = 658.52 : x
  2. Step 2: Convert to fraction form
    842.02/1,261.49 = 658.52/x
  3. Step 3: Cross multiply
    842.02x = 1,261.49 × 658.52
  4. Step 4: Simplify right side
    842.02x = 830,716.39
  5. Step 5: Solve for x
    x = 830,716.39/842.02
  6. Step 6: Final answer
    x = 986.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.