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Finding the Fourth Proportional to 876.46, 1,211.11 and 750.40

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Solution

The fourth proportional to 876.46, 1,211.11 and 750.40 is: 1,036.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.46 : 1,211.11 = 750.40 : x
  2. Step 2: Convert to fraction form
    876.46/1,211.11 = 750.40/x
  3. Step 3: Cross multiply
    876.46x = 1,211.11 × 750.40
  4. Step 4: Simplify right side
    876.46x = 908,814.85
  5. Step 5: Solve for x
    x = 908,814.85/876.46
  6. Step 6: Final answer
    x = 1,036.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.