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Finding the Fourth Proportional to 3,489.04, 4,814.82 and 1,917.20

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Solution

The fourth proportional to 3,489.04, 4,814.82 and 1,917.20 is: 2,645.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.04 : 4,814.82 = 1,917.20 : x
  2. Step 2: Convert to fraction form
    3,489.04/4,814.82 = 1,917.20/x
  3. Step 3: Cross multiply
    3,489.04x = 4,814.82 × 1,917.20
  4. Step 4: Simplify right side
    3,489.04x = 9,230,972.90
  5. Step 5: Solve for x
    x = 9,230,972.90/3,489.04
  6. Step 6: Final answer
    x = 2,645.71

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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.