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Finding the Fourth Proportional to 1,196.60, 1,651.44 and 699.20

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Solution

The fourth proportional to 1,196.60, 1,651.44 and 699.20 is: 964.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,196.60 : 1,651.44 = 699.20 : x
  2. Step 2: Convert to fraction form
    1,196.60/1,651.44 = 699.20/x
  3. Step 3: Cross multiply
    1,196.60x = 1,651.44 × 699.20
  4. Step 4: Simplify right side
    1,196.60x = 1,154,686.85
  5. Step 5: Solve for x
    x = 1,154,686.85/1,196.60
  6. Step 6: Final answer
    x = 964.97

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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.