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Finding the Fourth Proportional to 680.80, 954.40 and 680.80

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Solution

The fourth proportional to 680.80, 954.40 and 680.80 is: 954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.80 : 954.40 = 680.80 : x
  2. Step 2: Convert to fraction form
    680.80/954.40 = 680.80/x
  3. Step 3: Cross multiply
    680.80x = 954.40 × 680.80
  4. Step 4: Simplify right side
    680.80x = 649,755.52
  5. Step 5: Solve for x
    x = 649,755.52/680.80
  6. Step 6: Final answer
    x = 954.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.