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Finding the Fourth Proportional to 465.65, 642.53 and 269.17

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Solution

The fourth proportional to 465.65, 642.53 and 269.17 is: 371.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.65 : 642.53 = 269.17 : x
  2. Step 2: Convert to fraction form
    465.65/642.53 = 269.17/x
  3. Step 3: Cross multiply
    465.65x = 642.53 × 269.17
  4. Step 4: Simplify right side
    465.65x = 172,950.47
  5. Step 5: Solve for x
    x = 172,950.47/465.65
  6. Step 6: Final answer
    x = 371.42

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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.