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Finding the Fourth Proportional to 578.18, 861.71 and 577.28

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Solution

The fourth proportional to 578.18, 861.71 and 577.28 is: 860.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.18 : 861.71 = 577.28 : x
  2. Step 2: Convert to fraction form
    578.18/861.71 = 577.28/x
  3. Step 3: Cross multiply
    578.18x = 861.71 × 577.28
  4. Step 4: Simplify right side
    578.18x = 497,445.06
  5. Step 5: Solve for x
    x = 497,445.06/578.18
  6. Step 6: Final answer
    x = 860.36

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Double scale
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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.