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Finding the Fourth Proportional to 323.29, 487.58 and 317.53

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Solution

The fourth proportional to 323.29, 487.58 and 317.53 is: 478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.29 : 487.58 = 317.53 : x
  2. Step 2: Convert to fraction form
    323.29/487.58 = 317.53/x
  3. Step 3: Cross multiply
    323.29x = 487.58 × 317.53
  4. Step 4: Simplify right side
    323.29x = 154,820.48
  5. Step 5: Solve for x
    x = 154,820.48/323.29
  6. Step 6: Final answer
    x = 478.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.