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Finding the Fourth Proportional to 1,197.13, 1,651.48 and 699.79

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Solution

The fourth proportional to 1,197.13, 1,651.48 and 699.79 is: 965.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.13 : 1,651.48 = 699.79 : x
  2. Step 2: Convert to fraction form
    1,197.13/1,651.48 = 699.79/x
  3. Step 3: Cross multiply
    1,197.13x = 1,651.48 × 699.79
  4. Step 4: Simplify right side
    1,197.13x = 1,155,689.19
  5. Step 5: Solve for x
    x = 1,155,689.19/1,197.13
  6. Step 6: Final answer
    x = 965.38

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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.