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Finding the Fourth Proportional to 2,587.74, 3,881.61 and 944.31

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Solution

The fourth proportional to 2,587.74, 3,881.61 and 944.31 is: 1,416.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.74 : 3,881.61 = 944.31 : x
  2. Step 2: Convert to fraction form
    2,587.74/3,881.61 = 944.31/x
  3. Step 3: Cross multiply
    2,587.74x = 3,881.61 × 944.31
  4. Step 4: Simplify right side
    2,587.74x = 3,665,443.14
  5. Step 5: Solve for x
    x = 3,665,443.14/2,587.74
  6. Step 6: Final answer
    x = 1,416.47

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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.