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Finding the Fourth Proportional to 861.18, 1,291.23 and 568.37

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Solution

The fourth proportional to 861.18, 1,291.23 and 568.37 is: 852.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.18 : 1,291.23 = 568.37 : x
  2. Step 2: Convert to fraction form
    861.18/1,291.23 = 568.37/x
  3. Step 3: Cross multiply
    861.18x = 1,291.23 × 568.37
  4. Step 4: Simplify right side
    861.18x = 733,896.40
  5. Step 5: Solve for x
    x = 733,896.40/861.18
  6. Step 6: Final answer
    x = 852.20

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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.