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Finding the Fourth Proportional to 942.12, 1,299.51 and 610.97

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Solution

The fourth proportional to 942.12, 1,299.51 and 610.97 is: 842.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.12 : 1,299.51 = 610.97 : x
  2. Step 2: Convert to fraction form
    942.12/1,299.51 = 610.97/x
  3. Step 3: Cross multiply
    942.12x = 1,299.51 × 610.97
  4. Step 4: Simplify right side
    942.12x = 793,955.13
  5. Step 5: Solve for x
    x = 793,955.13/942.12
  6. Step 6: Final answer
    x = 842.73

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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.