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Finding the Fourth Proportional to 680.60, 1,019.99 and 247.34

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Solution

The fourth proportional to 680.60, 1,019.99 and 247.34 is: 370.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.60 : 1,019.99 = 247.34 : x
  2. Step 2: Convert to fraction form
    680.60/1,019.99 = 247.34/x
  3. Step 3: Cross multiply
    680.60x = 1,019.99 × 247.34
  4. Step 4: Simplify right side
    680.60x = 252,279.84
  5. Step 5: Solve for x
    x = 252,279.84/680.60
  6. Step 6: Final answer
    x = 370.68

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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.