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Finding the Fourth Proportional to 340.28, 506.69 and 311.24

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Solution

The fourth proportional to 340.28, 506.69 and 311.24 is: 463.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.28 : 506.69 = 311.24 : x
  2. Step 2: Convert to fraction form
    340.28/506.69 = 311.24/x
  3. Step 3: Cross multiply
    340.28x = 506.69 × 311.24
  4. Step 4: Simplify right side
    340.28x = 157,702.20
  5. Step 5: Solve for x
    x = 157,702.20/340.28
  6. Step 6: Final answer
    x = 463.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.