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Finding the Fourth Proportional to 574.68, 860.88 and 379.80

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Solution

The fourth proportional to 574.68, 860.88 and 379.80 is: 568.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.68 : 860.88 = 379.80 : x
  2. Step 2: Convert to fraction form
    574.68/860.88 = 379.80/x
  3. Step 3: Cross multiply
    574.68x = 860.88 × 379.80
  4. Step 4: Simplify right side
    574.68x = 326,962.22
  5. Step 5: Solve for x
    x = 326,962.22/574.68
  6. Step 6: Final answer
    x = 568.95

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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.