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Finding the Fourth Proportional to 761.23, 1,049.72 and 495.69

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Solution

The fourth proportional to 761.23, 1,049.72 and 495.69 is: 683.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.23 : 1,049.72 = 495.69 : x
  2. Step 2: Convert to fraction form
    761.23/1,049.72 = 495.69/x
  3. Step 3: Cross multiply
    761.23x = 1,049.72 × 495.69
  4. Step 4: Simplify right side
    761.23x = 520,330.69
  5. Step 5: Solve for x
    x = 520,330.69/761.23
  6. Step 6: Final answer
    x = 683.54

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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.