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Finding the Fourth Proportional to 310.16, 465.39 and 147.85

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Solution

The fourth proportional to 310.16, 465.39 and 147.85 is: 221.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.16 : 465.39 = 147.85 : x
  2. Step 2: Convert to fraction form
    310.16/465.39 = 147.85/x
  3. Step 3: Cross multiply
    310.16x = 465.39 × 147.85
  4. Step 4: Simplify right side
    310.16x = 68,806.75
  5. Step 5: Solve for x
    x = 68,806.75/310.16
  6. Step 6: Final answer
    x = 221.84

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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.