Home / 1,171.11-1,615.75-699.15

Finding the Fourth Proportional to 1,171.11, 1,615.75 and 699.15

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Solution

The fourth proportional to 1,171.11, 1,615.75 and 699.15 is: 964.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.11 : 1,615.75 = 699.15 : x
  2. Step 2: Convert to fraction form
    1,171.11/1,615.75 = 699.15/x
  3. Step 3: Cross multiply
    1,171.11x = 1,615.75 × 699.15
  4. Step 4: Simplify right side
    1,171.11x = 1,129,651.61
  5. Step 5: Solve for x
    x = 1,129,651.61/1,171.11
  6. Step 6: Final answer
    x = 964.60

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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.