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Finding the Fourth Proportional to 609.64, 842.62 and 539.20

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Solution

The fourth proportional to 609.64, 842.62 and 539.20 is: 745.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.64 : 842.62 = 539.20 : x
  2. Step 2: Convert to fraction form
    609.64/842.62 = 539.20/x
  3. Step 3: Cross multiply
    609.64x = 842.62 × 539.20
  4. Step 4: Simplify right side
    609.64x = 454,340.70
  5. Step 5: Solve for x
    x = 454,340.70/609.64
  6. Step 6: Final answer
    x = 745.26

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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.