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Finding the Fourth Proportional to 514.53, 770.13 and 487.80

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Solution

The fourth proportional to 514.53, 770.13 and 487.80 is: 730.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.53 : 770.13 = 487.80 : x
  2. Step 2: Convert to fraction form
    514.53/770.13 = 487.80/x
  3. Step 3: Cross multiply
    514.53x = 770.13 × 487.80
  4. Step 4: Simplify right side
    514.53x = 375,669.41
  5. Step 5: Solve for x
    x = 375,669.41/514.53
  6. Step 6: Final answer
    x = 730.12

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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.