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Finding the Fourth Proportional to 869.08, 1,200.91 and 658.88

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Solution

The fourth proportional to 869.08, 1,200.91 and 658.88 is: 910.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.08 : 1,200.91 = 658.88 : x
  2. Step 2: Convert to fraction form
    869.08/1,200.91 = 658.88/x
  3. Step 3: Cross multiply
    869.08x = 1,200.91 × 658.88
  4. Step 4: Simplify right side
    869.08x = 791,263.20
  5. Step 5: Solve for x
    x = 791,263.20/869.08
  6. Step 6: Final answer
    x = 910.46

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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.