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Finding the Fourth Proportional to 814.94, 1,125.09 and 553.34

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Solution

The fourth proportional to 814.94, 1,125.09 and 553.34 is: 763.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.94 : 1,125.09 = 553.34 : x
  2. Step 2: Convert to fraction form
    814.94/1,125.09 = 553.34/x
  3. Step 3: Cross multiply
    814.94x = 1,125.09 × 553.34
  4. Step 4: Simplify right side
    814.94x = 622,557.30
  5. Step 5: Solve for x
    x = 622,557.30/814.94
  6. Step 6: Final answer
    x = 763.93

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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.