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Finding the Fourth Proportional to 1,176.76, 1,764.21 and 743

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Solution

The fourth proportional to 1,176.76, 1,764.21 and 743 is: 1,113.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.76 : 1,764.21 = 743 : x
  2. Step 2: Convert to fraction form
    1,176.76/1,764.21 = 743/x
  3. Step 3: Cross multiply
    1,176.76x = 1,764.21 × 743
  4. Step 4: Simplify right side
    1,176.76x = 1,310,808.03
  5. Step 5: Solve for x
    x = 1,310,808.03/1,176.76
  6. Step 6: Final answer
    x = 1,113.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.