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Finding the Fourth Proportional to 645.54, 966.57 and 514.92

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Solution

The fourth proportional to 645.54, 966.57 and 514.92 is: 770.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.54 : 966.57 = 514.92 : x
  2. Step 2: Convert to fraction form
    645.54/966.57 = 514.92/x
  3. Step 3: Cross multiply
    645.54x = 966.57 × 514.92
  4. Step 4: Simplify right side
    645.54x = 497,706.22
  5. Step 5: Solve for x
    x = 497,706.22/645.54
  6. Step 6: Final answer
    x = 770.99

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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.