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Finding the Fourth Proportional to 514.60, 772.80 and 498.40

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Solution

The fourth proportional to 514.60, 772.80 and 498.40 is: 748.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.60 : 772.80 = 498.40 : x
  2. Step 2: Convert to fraction form
    514.60/772.80 = 498.40/x
  3. Step 3: Cross multiply
    514.60x = 772.80 × 498.40
  4. Step 4: Simplify right side
    514.60x = 385,163.52
  5. Step 5: Solve for x
    x = 385,163.52/514.60
  6. Step 6: Final answer
    x = 748.47

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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.