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Finding the Fourth Proportional to 942.74, 1,299.85 and 611.04

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Solution

The fourth proportional to 942.74, 1,299.85 and 611.04 is: 842.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.74 : 1,299.85 = 611.04 : x
  2. Step 2: Convert to fraction form
    942.74/1,299.85 = 611.04/x
  3. Step 3: Cross multiply
    942.74x = 1,299.85 × 611.04
  4. Step 4: Simplify right side
    942.74x = 794,263.69
  5. Step 5: Solve for x
    x = 794,263.69/942.74
  6. Step 6: Final answer
    x = 842.51

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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.