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Finding the Fourth Proportional to 2,371.54, 3,558.39 and 985.90

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Solution

The fourth proportional to 2,371.54, 3,558.39 and 985.90 is: 1,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,371.54 : 3,558.39 = 985.90 : x
  2. Step 2: Convert to fraction form
    2,371.54/3,558.39 = 985.90/x
  3. Step 3: Cross multiply
    2,371.54x = 3,558.39 × 985.90
  4. Step 4: Simplify right side
    2,371.54x = 3,508,204.11
  5. Step 5: Solve for x
    x = 3,508,204.11/2,371.54
  6. Step 6: Final answer
    x = 1,479.30

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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.