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Finding the Fourth Proportional to 1,245.37, 1,868.04 and 514.42

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Solution

The fourth proportional to 1,245.37, 1,868.04 and 514.42 is: 771.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.37 : 1,868.04 = 514.42 : x
  2. Step 2: Convert to fraction form
    1,245.37/1,868.04 = 514.42/x
  3. Step 3: Cross multiply
    1,245.37x = 1,868.04 × 514.42
  4. Step 4: Simplify right side
    1,245.37x = 960,957.14
  5. Step 5: Solve for x
    x = 960,957.14/1,245.37
  6. Step 6: Final answer
    x = 771.62

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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.