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Finding the Fourth Proportional to 372.72, 556.30 and 317.52

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Solution

The fourth proportional to 372.72, 556.30 and 317.52 is: 473.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.72 : 556.30 = 317.52 : x
  2. Step 2: Convert to fraction form
    372.72/556.30 = 317.52/x
  3. Step 3: Cross multiply
    372.72x = 556.30 × 317.52
  4. Step 4: Simplify right side
    372.72x = 176,636.38
  5. Step 5: Solve for x
    x = 176,636.38/372.72
  6. Step 6: Final answer
    x = 473.91

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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.