Home / 1,489.18-2,231.70-756.94

Finding the Fourth Proportional to 1,489.18, 2,231.70 and 756.94

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Solution

The fourth proportional to 1,489.18, 2,231.70 and 756.94 is: 1,134.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.18 : 2,231.70 = 756.94 : x
  2. Step 2: Convert to fraction form
    1,489.18/2,231.70 = 756.94/x
  3. Step 3: Cross multiply
    1,489.18x = 2,231.70 × 756.94
  4. Step 4: Simplify right side
    1,489.18x = 1,689,263.00
  5. Step 5: Solve for x
    x = 1,689,263.00/1,489.18
  6. Step 6: Final answer
    x = 1,134.36

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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.