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Finding the Fourth Proportional to 868.52, 1,197.60 and 658.64

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Solution

The fourth proportional to 868.52, 1,197.60 and 658.64 is: 908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.52 : 1,197.60 = 658.64 : x
  2. Step 2: Convert to fraction form
    868.52/1,197.60 = 658.64/x
  3. Step 3: Cross multiply
    868.52x = 1,197.60 × 658.64
  4. Step 4: Simplify right side
    868.52x = 788,787.26
  5. Step 5: Solve for x
    x = 788,787.26/868.52
  6. Step 6: Final answer
    x = 908.20

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1.5x scale

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.