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Finding the Fourth Proportional to 579.41, 861.68 and 561.18

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Solution

The fourth proportional to 579.41, 861.68 and 561.18 is: 834.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.41 : 861.68 = 561.18 : x
  2. Step 2: Convert to fraction form
    579.41/861.68 = 561.18/x
  3. Step 3: Cross multiply
    579.41x = 861.68 × 561.18
  4. Step 4: Simplify right side
    579.41x = 483,554.78
  5. Step 5: Solve for x
    x = 483,554.78/579.41
  6. Step 6: Final answer
    x = 834.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.