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Finding the Fourth Proportional to 5,490.74, 7,575.90 and 3,100.76

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Solution

The fourth proportional to 5,490.74, 7,575.90 and 3,100.76 is: 4,278.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490.74 : 7,575.90 = 3,100.76 : x
  2. Step 2: Convert to fraction form
    5,490.74/7,575.90 = 3,100.76/x
  3. Step 3: Cross multiply
    5,490.74x = 7,575.90 × 3,100.76
  4. Step 4: Simplify right side
    5,490.74x = 23,491,031.44
  5. Step 5: Solve for x
    x = 23,491,031.44/5,490.74
  6. Step 6: Final answer
    x = 4,278.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.