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Finding the Fourth Proportional to 1,171.46, 1,615.88 and 699.04

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Solution

The fourth proportional to 1,171.46, 1,615.88 and 699.04 is: 964.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.46 : 1,615.88 = 699.04 : x
  2. Step 2: Convert to fraction form
    1,171.46/1,615.88 = 699.04/x
  3. Step 3: Cross multiply
    1,171.46x = 1,615.88 × 699.04
  4. Step 4: Simplify right side
    1,171.46x = 1,129,564.76
  5. Step 5: Solve for x
    x = 1,129,564.76/1,171.46
  6. Step 6: Final answer
    x = 964.24

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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.