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Finding the Fourth Proportional to 1,672.42, 2,509.20 and 748.62

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Solution

The fourth proportional to 1,672.42, 2,509.20 and 748.62 is: 1,123.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.42 : 2,509.20 = 748.62 : x
  2. Step 2: Convert to fraction form
    1,672.42/2,509.20 = 748.62/x
  3. Step 3: Cross multiply
    1,672.42x = 2,509.20 × 748.62
  4. Step 4: Simplify right side
    1,672.42x = 1,878,437.30
  5. Step 5: Solve for x
    x = 1,878,437.30/1,672.42
  6. Step 6: Final answer
    x = 1,123.19

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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.