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Finding the Fourth Proportional to 574.79, 862.19 and 401.80

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Solution

The fourth proportional to 574.79, 862.19 and 401.80 is: 602.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.79 : 862.19 = 401.80 : x
  2. Step 2: Convert to fraction form
    574.79/862.19 = 401.80/x
  3. Step 3: Cross multiply
    574.79x = 862.19 × 401.80
  4. Step 4: Simplify right side
    574.79x = 346,423.78
  5. Step 5: Solve for x
    x = 346,423.78/574.79
  6. Step 6: Final answer
    x = 602.69

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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.