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Finding the Fourth Proportional to 1,461.67, 2,192.49 and 991.98

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Solution

The fourth proportional to 1,461.67, 2,192.49 and 991.98 is: 1,487.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,461.67 : 2,192.49 = 991.98 : x
  2. Step 2: Convert to fraction form
    1,461.67/2,192.49 = 991.98/x
  3. Step 3: Cross multiply
    1,461.67x = 2,192.49 × 991.98
  4. Step 4: Simplify right side
    1,461.67x = 2,174,906.23
  5. Step 5: Solve for x
    x = 2,174,906.23/1,461.67
  6. Step 6: Final answer
    x = 1,487.96

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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.