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Finding the Fourth Proportional to 645.55, 966.30 and 625.30

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Solution

The fourth proportional to 645.55, 966.30 and 625.30 is: 935.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.55 : 966.30 = 625.30 : x
  2. Step 2: Convert to fraction form
    645.55/966.30 = 625.30/x
  3. Step 3: Cross multiply
    645.55x = 966.30 × 625.30
  4. Step 4: Simplify right side
    645.55x = 604,227.39
  5. Step 5: Solve for x
    x = 604,227.39/645.55
  6. Step 6: Final answer
    x = 935.99

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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.