Home / 1,211.46-1,818.29-750.12

Finding the Fourth Proportional to 1,211.46, 1,818.29 and 750.12

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Solution

The fourth proportional to 1,211.46, 1,818.29 and 750.12 is: 1,125.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.46 : 1,818.29 = 750.12 : x
  2. Step 2: Convert to fraction form
    1,211.46/1,818.29 = 750.12/x
  3. Step 3: Cross multiply
    1,211.46x = 1,818.29 × 750.12
  4. Step 4: Simplify right side
    1,211.46x = 1,363,935.69
  5. Step 5: Solve for x
    x = 1,363,935.69/1,211.46
  6. Step 6: Final answer
    x = 1,125.86

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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.