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Finding the Fourth Proportional to 3,278.28, 4,918.29 and 1,889.12

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Solution

The fourth proportional to 3,278.28, 4,918.29 and 1,889.12 is: 2,834.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278.28 : 4,918.29 = 1,889.12 : x
  2. Step 2: Convert to fraction form
    3,278.28/4,918.29 = 1,889.12/x
  3. Step 3: Cross multiply
    3,278.28x = 4,918.29 × 1,889.12
  4. Step 4: Simplify right side
    3,278.28x = 9,291,215.41
  5. Step 5: Solve for x
    x = 9,291,215.41/3,278.28
  6. Step 6: Final answer
    x = 2,834.17

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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.