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Finding the Fourth Proportional to 753.73, 1,130.45 and 205.87

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Solution

The fourth proportional to 753.73, 1,130.45 and 205.87 is: 308.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.73 : 1,130.45 = 205.87 : x
  2. Step 2: Convert to fraction form
    753.73/1,130.45 = 205.87/x
  3. Step 3: Cross multiply
    753.73x = 1,130.45 × 205.87
  4. Step 4: Simplify right side
    753.73x = 232,723.56
  5. Step 5: Solve for x
    x = 232,723.56/753.73
  6. Step 6: Final answer
    x = 308.76

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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.