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Finding the Fourth Proportional to 988.06, 1,481.17 and 372.17

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Solution

The fourth proportional to 988.06, 1,481.17 and 372.17 is: 557.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.06 : 1,481.17 = 372.17 : x
  2. Step 2: Convert to fraction form
    988.06/1,481.17 = 372.17/x
  3. Step 3: Cross multiply
    988.06x = 1,481.17 × 372.17
  4. Step 4: Simplify right side
    988.06x = 551,246.34
  5. Step 5: Solve for x
    x = 551,246.34/988.06
  6. Step 6: Final answer
    x = 557.91

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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.