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Finding the Fourth Proportional to 753.82, 1,129.83 and 654.49

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Solution

The fourth proportional to 753.82, 1,129.83 and 654.49 is: 980.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.82 : 1,129.83 = 654.49 : x
  2. Step 2: Convert to fraction form
    753.82/1,129.83 = 654.49/x
  3. Step 3: Cross multiply
    753.82x = 1,129.83 × 654.49
  4. Step 4: Simplify right side
    753.82x = 739,462.44
  5. Step 5: Solve for x
    x = 739,462.44/753.82
  6. Step 6: Final answer
    x = 980.95

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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.