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Finding the Fourth Proportional to 1,672.47, 2,508.49 and 439.99

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Solution

The fourth proportional to 1,672.47, 2,508.49 and 439.99 is: 659.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.47 : 2,508.49 = 439.99 : x
  2. Step 2: Convert to fraction form
    1,672.47/2,508.49 = 439.99/x
  3. Step 3: Cross multiply
    1,672.47x = 2,508.49 × 439.99
  4. Step 4: Simplify right side
    1,672.47x = 1,103,710.52
  5. Step 5: Solve for x
    x = 1,103,710.52/1,672.47
  6. Step 6: Final answer
    x = 659.93

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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.