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Finding the Fourth Proportional to 879.20, 1,317.48 and 590.12

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Solution

The fourth proportional to 879.20, 1,317.48 and 590.12 is: 884.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.20 : 1,317.48 = 590.12 : x
  2. Step 2: Convert to fraction form
    879.20/1,317.48 = 590.12/x
  3. Step 3: Cross multiply
    879.20x = 1,317.48 × 590.12
  4. Step 4: Simplify right side
    879.20x = 777,471.30
  5. Step 5: Solve for x
    x = 777,471.30/879.20
  6. Step 6: Final answer
    x = 884.29

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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.