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Finding the Fourth Proportional to 317.40, 476.09 and 188.29

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Solution

The fourth proportional to 317.40, 476.09 and 188.29 is: 282.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.40 : 476.09 = 188.29 : x
  2. Step 2: Convert to fraction form
    317.40/476.09 = 188.29/x
  3. Step 3: Cross multiply
    317.40x = 476.09 × 188.29
  4. Step 4: Simplify right side
    317.40x = 89,640.61
  5. Step 5: Solve for x
    x = 89,640.61/317.40
  6. Step 6: Final answer
    x = 282.42

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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.