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Finding the Fourth Proportional to 1,083.47, 1,626.11 and 981.41

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Solution

The fourth proportional to 1,083.47, 1,626.11 and 981.41 is: 1,472.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.47 : 1,626.11 = 981.41 : x
  2. Step 2: Convert to fraction form
    1,083.47/1,626.11 = 981.41/x
  3. Step 3: Cross multiply
    1,083.47x = 1,626.11 × 981.41
  4. Step 4: Simplify right side
    1,083.47x = 1,595,867.58
  5. Step 5: Solve for x
    x = 1,595,867.58/1,083.47
  6. Step 6: Final answer
    x = 1,472.93

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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.