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Finding the Fourth Proportional to 318.30, 475.05 and 240.88

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Solution

The fourth proportional to 318.30, 475.05 and 240.88 is: 359.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.30 : 475.05 = 240.88 : x
  2. Step 2: Convert to fraction form
    318.30/475.05 = 240.88/x
  3. Step 3: Cross multiply
    318.30x = 475.05 × 240.88
  4. Step 4: Simplify right side
    318.30x = 114,430.04
  5. Step 5: Solve for x
    x = 114,430.04/318.30
  6. Step 6: Final answer
    x = 359.50

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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.