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Finding the Fourth Proportional to 545.46, 817.74 and 514.90

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Solution

The fourth proportional to 545.46, 817.74 and 514.90 is: 771.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.46 : 817.74 = 514.90 : x
  2. Step 2: Convert to fraction form
    545.46/817.74 = 514.90/x
  3. Step 3: Cross multiply
    545.46x = 817.74 × 514.90
  4. Step 4: Simplify right side
    545.46x = 421,052.28
  5. Step 5: Solve for x
    x = 421,052.28/545.46
  6. Step 6: Final answer
    x = 771.92

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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.