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Finding the Fourth Proportional to 1,331.90, 1,998.02 and 714.76

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Solution

The fourth proportional to 1,331.90, 1,998.02 and 714.76 is: 1,072.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.90 : 1,998.02 = 714.76 : x
  2. Step 2: Convert to fraction form
    1,331.90/1,998.02 = 714.76/x
  3. Step 3: Cross multiply
    1,331.90x = 1,998.02 × 714.76
  4. Step 4: Simplify right side
    1,331.90x = 1,428,094.79
  5. Step 5: Solve for x
    x = 1,428,094.79/1,331.90
  6. Step 6: Final answer
    x = 1,072.22

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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.