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Finding the Fourth Proportional to 973.27, 1,343.12 and 553.61

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Solution

The fourth proportional to 973.27, 1,343.12 and 553.61 is: 763.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.27 : 1,343.12 = 553.61 : x
  2. Step 2: Convert to fraction form
    973.27/1,343.12 = 553.61/x
  3. Step 3: Cross multiply
    973.27x = 1,343.12 × 553.61
  4. Step 4: Simplify right side
    973.27x = 743,564.66
  5. Step 5: Solve for x
    x = 743,564.66/973.27
  6. Step 6: Final answer
    x = 763.99

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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.