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Finding the Fourth Proportional to 6,469.20, 8,920.80 and 4,795.20

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Solution

The fourth proportional to 6,469.20, 8,920.80 and 4,795.20 is: 6,612.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,469.20 : 8,920.80 = 4,795.20 : x
  2. Step 2: Convert to fraction form
    6,469.20/8,920.80 = 4,795.20/x
  3. Step 3: Cross multiply
    6,469.20x = 8,920.80 × 4,795.20
  4. Step 4: Simplify right side
    6,469.20x = 42,777,020.16
  5. Step 5: Solve for x
    x = 42,777,020.16/6,469.20
  6. Step 6: Final answer
    x = 6,612.41

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1.5x scale

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.