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Finding the Fourth Proportional to 988.07, 1,481.88 and 635.61

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Solution

The fourth proportional to 988.07, 1,481.88 and 635.61 is: 953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.07 : 1,481.88 = 635.61 : x
  2. Step 2: Convert to fraction form
    988.07/1,481.88 = 635.61/x
  3. Step 3: Cross multiply
    988.07x = 1,481.88 × 635.61
  4. Step 4: Simplify right side
    988.07x = 941,897.75
  5. Step 5: Solve for x
    x = 941,897.75/988.07
  6. Step 6: Final answer
    x = 953.28

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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.