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Finding the Fourth Proportional to 411.80, 615.36 and 295.70

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Solution

The fourth proportional to 411.80, 615.36 and 295.70 is: 441.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.80 : 615.36 = 295.70 : x
  2. Step 2: Convert to fraction form
    411.80/615.36 = 295.70/x
  3. Step 3: Cross multiply
    411.80x = 615.36 × 295.70
  4. Step 4: Simplify right side
    411.80x = 181,960.47
  5. Step 5: Solve for x
    x = 181,960.47/411.80
  6. Step 6: Final answer
    x = 441.87

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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.