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Finding the Fourth Proportional to 892.34, 1,338.53 and 790.88

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Solution

The fourth proportional to 892.34, 1,338.53 and 790.88 is: 1,186.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.34 : 1,338.53 = 790.88 : x
  2. Step 2: Convert to fraction form
    892.34/1,338.53 = 790.88/x
  3. Step 3: Cross multiply
    892.34x = 1,338.53 × 790.88
  4. Step 4: Simplify right side
    892.34x = 1,058,605.96
  5. Step 5: Solve for x
    x = 1,058,605.96/892.34
  6. Step 6: Final answer
    x = 1,186.33

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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.