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Finding the Fourth Proportional to 435.52, 601.20 and 311.23

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Solution

The fourth proportional to 435.52, 601.20 and 311.23 is: 429.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.52 : 601.20 = 311.23 : x
  2. Step 2: Convert to fraction form
    435.52/601.20 = 311.23/x
  3. Step 3: Cross multiply
    435.52x = 601.20 × 311.23
  4. Step 4: Simplify right side
    435.52x = 187,106.91
  5. Step 5: Solve for x
    x = 187,106.91/435.52
  6. Step 6: Final answer
    x = 429.62

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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.