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Finding the Fourth Proportional to 314.78, 471.49 and 152.13

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Solution

The fourth proportional to 314.78, 471.49 and 152.13 is: 227.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.78 : 471.49 = 152.13 : x
  2. Step 2: Convert to fraction form
    314.78/471.49 = 152.13/x
  3. Step 3: Cross multiply
    314.78x = 471.49 × 152.13
  4. Step 4: Simplify right side
    314.78x = 71,725.42
  5. Step 5: Solve for x
    x = 71,725.42/314.78
  6. Step 6: Final answer
    x = 227.86

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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.