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Finding the Fourth Proportional to 1,195.98, 1,650.12 and 691.86

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Solution

The fourth proportional to 1,195.98, 1,650.12 and 691.86 is: 954.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.98 : 1,650.12 = 691.86 : x
  2. Step 2: Convert to fraction form
    1,195.98/1,650.12 = 691.86/x
  3. Step 3: Cross multiply
    1,195.98x = 1,650.12 × 691.86
  4. Step 4: Simplify right side
    1,195.98x = 1,141,652.02
  5. Step 5: Solve for x
    x = 1,141,652.02/1,195.98
  6. Step 6: Final answer
    x = 954.57

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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.