Home / 1,207.46-1,811.11-720.14

Finding the Fourth Proportional to 1,207.46, 1,811.11 and 720.14

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Solution

The fourth proportional to 1,207.46, 1,811.11 and 720.14 is: 1,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.46 : 1,811.11 = 720.14 : x
  2. Step 2: Convert to fraction form
    1,207.46/1,811.11 = 720.14/x
  3. Step 3: Cross multiply
    1,207.46x = 1,811.11 × 720.14
  4. Step 4: Simplify right side
    1,207.46x = 1,304,253.44
  5. Step 5: Solve for x
    x = 1,304,253.44/1,207.46
  6. Step 6: Final answer
    x = 1,080.17

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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.