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Finding the Fourth Proportional to 979.08, 1,350.90 and 559.44

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Solution

The fourth proportional to 979.08, 1,350.90 and 559.44 is: 771.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.08 : 1,350.90 = 559.44 : x
  2. Step 2: Convert to fraction form
    979.08/1,350.90 = 559.44/x
  3. Step 3: Cross multiply
    979.08x = 1,350.90 × 559.44
  4. Step 4: Simplify right side
    979.08x = 755,747.50
  5. Step 5: Solve for x
    x = 755,747.50/979.08
  6. Step 6: Final answer
    x = 771.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.