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Finding the Fourth Proportional to 971.88, 1,341.23 and 552.31

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Solution

The fourth proportional to 971.88, 1,341.23 and 552.31 is: 762.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.88 : 1,341.23 = 552.31 : x
  2. Step 2: Convert to fraction form
    971.88/1,341.23 = 552.31/x
  3. Step 3: Cross multiply
    971.88x = 1,341.23 × 552.31
  4. Step 4: Simplify right side
    971.88x = 740,770.11
  5. Step 5: Solve for x
    x = 740,770.11/971.88
  6. Step 6: Final answer
    x = 762.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.