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Finding the Fourth Proportional to 658.80, 986.58 and 625.86

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Solution

The fourth proportional to 658.80, 986.58 and 625.86 is: 937.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.80 : 986.58 = 625.86 : x
  2. Step 2: Convert to fraction form
    658.80/986.58 = 625.86/x
  3. Step 3: Cross multiply
    658.80x = 986.58 × 625.86
  4. Step 4: Simplify right side
    658.80x = 617,460.96
  5. Step 5: Solve for x
    x = 617,460.96/658.80
  6. Step 6: Final answer
    x = 937.25

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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.