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Finding the Fourth Proportional to 1,026.90, 1,540.38 and 449.76

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Solution

The fourth proportional to 1,026.90, 1,540.38 and 449.76 is: 674.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.90 : 1,540.38 = 449.76 : x
  2. Step 2: Convert to fraction form
    1,026.90/1,540.38 = 449.76/x
  3. Step 3: Cross multiply
    1,026.90x = 1,540.38 × 449.76
  4. Step 4: Simplify right side
    1,026.90x = 692,801.31
  5. Step 5: Solve for x
    x = 692,801.31/1,026.90
  6. Step 6: Final answer
    x = 674.65

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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.