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Finding the Fourth Proportional to 317.30, 475.64 and 100.82

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Solution

The fourth proportional to 317.30, 475.64 and 100.82 is: 151.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.30 : 475.64 = 100.82 : x
  2. Step 2: Convert to fraction form
    317.30/475.64 = 100.82/x
  3. Step 3: Cross multiply
    317.30x = 475.64 × 100.82
  4. Step 4: Simplify right side
    317.30x = 47,954.02
  5. Step 5: Solve for x
    x = 47,954.02/317.30
  6. Step 6: Final answer
    x = 151.13

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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.