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Finding the Fourth Proportional to 311.43, 430.13 and 242.32

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Solution

The fourth proportional to 311.43, 430.13 and 242.32 is: 334.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.43 : 430.13 = 242.32 : x
  2. Step 2: Convert to fraction form
    311.43/430.13 = 242.32/x
  3. Step 3: Cross multiply
    311.43x = 430.13 × 242.32
  4. Step 4: Simplify right side
    311.43x = 104,229.10
  5. Step 5: Solve for x
    x = 104,229.10/311.43
  6. Step 6: Final answer
    x = 334.68

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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.