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Finding the Fourth Proportional to 324.65, 487.13 and 170.70

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Solution

The fourth proportional to 324.65, 487.13 and 170.70 is: 256.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.65 : 487.13 = 170.70 : x
  2. Step 2: Convert to fraction form
    324.65/487.13 = 170.70/x
  3. Step 3: Cross multiply
    324.65x = 487.13 × 170.70
  4. Step 4: Simplify right side
    324.65x = 83,151.37
  5. Step 5: Solve for x
    x = 83,151.37/324.65
  6. Step 6: Final answer
    x = 256.13

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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.