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Finding the Fourth Proportional to 6,608.40, 9,910.20 and 3,320.40

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Solution

The fourth proportional to 6,608.40, 9,910.20 and 3,320.40 is: 4,979.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,608.40 : 9,910.20 = 3,320.40 : x
  2. Step 2: Convert to fraction form
    6,608.40/9,910.20 = 3,320.40/x
  3. Step 3: Cross multiply
    6,608.40x = 9,910.20 × 3,320.40
  4. Step 4: Simplify right side
    6,608.40x = 32,905,828.08
  5. Step 5: Solve for x
    x = 32,905,828.08/6,608.40
  6. Step 6: Final answer
    x = 4,979.39

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1.5x scale

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.