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Finding the Fourth Proportional to 410.80, 615.84 and 266.80

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Solution

The fourth proportional to 410.80, 615.84 and 266.80 is: 399.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.80 : 615.84 = 266.80 : x
  2. Step 2: Convert to fraction form
    410.80/615.84 = 266.80/x
  3. Step 3: Cross multiply
    410.80x = 615.84 × 266.80
  4. Step 4: Simplify right side
    410.80x = 164,306.11
  5. Step 5: Solve for x
    x = 164,306.11/410.80
  6. Step 6: Final answer
    x = 399.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.