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Finding the Fourth Proportional to 3,761.01, 5,642.60 and 1,128.74

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Solution

The fourth proportional to 3,761.01, 5,642.60 and 1,128.74 is: 1,693.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.01 : 5,642.60 = 1,128.74 : x
  2. Step 2: Convert to fraction form
    3,761.01/5,642.60 = 1,128.74/x
  3. Step 3: Cross multiply
    3,761.01x = 5,642.60 × 1,128.74
  4. Step 4: Simplify right side
    3,761.01x = 6,368,994.47
  5. Step 5: Solve for x
    x = 6,368,994.47/3,761.01
  6. Step 6: Final answer
    x = 1,693.43

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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.