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Finding the Fourth Proportional to 382.68, 571.41 and 317.88

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Solution

The fourth proportional to 382.68, 571.41 and 317.88 is: 474.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.68 : 571.41 = 317.88 : x
  2. Step 2: Convert to fraction form
    382.68/571.41 = 317.88/x
  3. Step 3: Cross multiply
    382.68x = 571.41 × 317.88
  4. Step 4: Simplify right side
    382.68x = 181,639.81
  5. Step 5: Solve for x
    x = 181,639.81/382.68
  6. Step 6: Final answer
    x = 474.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.