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Finding the Fourth Proportional to 942.30, 1,299.65 and 610.83

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Solution

The fourth proportional to 942.30, 1,299.65 and 610.83 is: 842.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.30 : 1,299.65 = 610.83 : x
  2. Step 2: Convert to fraction form
    942.30/1,299.65 = 610.83/x
  3. Step 3: Cross multiply
    942.30x = 1,299.65 × 610.83
  4. Step 4: Simplify right side
    942.30x = 793,862.16
  5. Step 5: Solve for x
    x = 793,862.16/942.30
  6. Step 6: Final answer
    x = 842.47

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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.