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Finding the Fourth Proportional to 314.31, 471.51 and 151.86

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Solution

The fourth proportional to 314.31, 471.51 and 151.86 is: 227.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.31 : 471.51 = 151.86 : x
  2. Step 2: Convert to fraction form
    314.31/471.51 = 151.86/x
  3. Step 3: Cross multiply
    314.31x = 471.51 × 151.86
  4. Step 4: Simplify right side
    314.31x = 71,603.51
  5. Step 5: Solve for x
    x = 71,603.51/314.31
  6. Step 6: Final answer
    x = 227.81

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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.