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Finding the Fourth Proportional to 575.81, 861.87 and 412.70

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Solution

The fourth proportional to 575.81, 861.87 and 412.70 is: 617.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.81 : 861.87 = 412.70 : x
  2. Step 2: Convert to fraction form
    575.81/861.87 = 412.70/x
  3. Step 3: Cross multiply
    575.81x = 861.87 × 412.70
  4. Step 4: Simplify right side
    575.81x = 355,689.44
  5. Step 5: Solve for x
    x = 355,689.44/575.81
  6. Step 6: Final answer
    x = 617.73

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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.