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Finding the Fourth Proportional to 574.01, 859.49 and 426.79

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Solution

The fourth proportional to 574.01, 859.49 and 426.79 is: 639.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.01 : 859.49 = 426.79 : x
  2. Step 2: Convert to fraction form
    574.01/859.49 = 426.79/x
  3. Step 3: Cross multiply
    574.01x = 859.49 × 426.79
  4. Step 4: Simplify right side
    574.01x = 366,821.74
  5. Step 5: Solve for x
    x = 366,821.74/574.01
  6. Step 6: Final answer
    x = 639.05

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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.