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Finding the Fourth Proportional to 1,539.46, 2,308.36 and 672.76

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Solution

The fourth proportional to 1,539.46, 2,308.36 and 672.76 is: 1,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.46 : 2,308.36 = 672.76 : x
  2. Step 2: Convert to fraction form
    1,539.46/2,308.36 = 672.76/x
  3. Step 3: Cross multiply
    1,539.46x = 2,308.36 × 672.76
  4. Step 4: Simplify right side
    1,539.46x = 1,552,972.27
  5. Step 5: Solve for x
    x = 1,552,972.27/1,539.46
  6. Step 6: Final answer
    x = 1,008.78

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1.5x scale

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.