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Finding the Fourth Proportional to 1,539.68, 2,308.80 and 674.24

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Solution

The fourth proportional to 1,539.68, 2,308.80 and 674.24 is: 1,011.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.68 : 2,308.80 = 674.24 : x
  2. Step 2: Convert to fraction form
    1,539.68/2,308.80 = 674.24/x
  3. Step 3: Cross multiply
    1,539.68x = 2,308.80 × 674.24
  4. Step 4: Simplify right side
    1,539.68x = 1,556,685.31
  5. Step 5: Solve for x
    x = 1,556,685.31/1,539.68
  6. Step 6: Final answer
    x = 1,011.04

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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.