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Finding the Fourth Proportional to 574.60, 862.80 and 437.80

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Solution

The fourth proportional to 574.60, 862.80 and 437.80 is: 657.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.60 : 862.80 = 437.80 : x
  2. Step 2: Convert to fraction form
    574.60/862.80 = 437.80/x
  3. Step 3: Cross multiply
    574.60x = 862.80 × 437.80
  4. Step 4: Simplify right side
    574.60x = 377,733.84
  5. Step 5: Solve for x
    x = 377,733.84/574.60
  6. Step 6: Final answer
    x = 657.39

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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.