Home / 1,439.49-2,159.46-709.11

Finding the Fourth Proportional to 1,439.49, 2,159.46 and 709.11

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Solution

The fourth proportional to 1,439.49, 2,159.46 and 709.11 is: 1,063.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.49 : 2,159.46 = 709.11 : x
  2. Step 2: Convert to fraction form
    1,439.49/2,159.46 = 709.11/x
  3. Step 3: Cross multiply
    1,439.49x = 2,159.46 × 709.11
  4. Step 4: Simplify right side
    1,439.49x = 1,531,294.68
  5. Step 5: Solve for x
    x = 1,531,294.68/1,439.49
  6. Step 6: Final answer
    x = 1,063.78

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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.