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Finding the Fourth Proportional to 1,245.55, 1,868.54 and 514.73

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Solution

The fourth proportional to 1,245.55, 1,868.54 and 514.73 is: 772.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.55 : 1,868.54 = 514.73 : x
  2. Step 2: Convert to fraction form
    1,245.55/1,868.54 = 514.73/x
  3. Step 3: Cross multiply
    1,245.55x = 1,868.54 × 514.73
  4. Step 4: Simplify right side
    1,245.55x = 961,793.59
  5. Step 5: Solve for x
    x = 961,793.59/1,245.55
  6. Step 6: Final answer
    x = 772.18

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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.