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Finding the Fourth Proportional to 3,291.10, 4,930.13 and 1,728.76

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Solution

The fourth proportional to 3,291.10, 4,930.13 and 1,728.76 is: 2,589.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291.10 : 4,930.13 = 1,728.76 : x
  2. Step 2: Convert to fraction form
    3,291.10/4,930.13 = 1,728.76/x
  3. Step 3: Cross multiply
    3,291.10x = 4,930.13 × 1,728.76
  4. Step 4: Simplify right side
    3,291.10x = 8,523,011.54
  5. Step 5: Solve for x
    x = 8,523,011.54/3,291.10
  6. Step 6: Final answer
    x = 2,589.72

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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.