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Finding the Fourth Proportional to 313.56, 432.20 and 247.92

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Solution

The fourth proportional to 313.56, 432.20 and 247.92 is: 341.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.56 : 432.20 = 247.92 : x
  2. Step 2: Convert to fraction form
    313.56/432.20 = 247.92/x
  3. Step 3: Cross multiply
    313.56x = 432.20 × 247.92
  4. Step 4: Simplify right side
    313.56x = 107,151.02
  5. Step 5: Solve for x
    x = 107,151.02/313.56
  6. Step 6: Final answer
    x = 341.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.