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Finding the Fourth Proportional to 1,168.76, 1,753.38 and 803.72

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Solution

The fourth proportional to 1,168.76, 1,753.38 and 803.72 is: 1,205.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.76 : 1,753.38 = 803.72 : x
  2. Step 2: Convert to fraction form
    1,168.76/1,753.38 = 803.72/x
  3. Step 3: Cross multiply
    1,168.76x = 1,753.38 × 803.72
  4. Step 4: Simplify right side
    1,168.76x = 1,409,226.57
  5. Step 5: Solve for x
    x = 1,409,226.57/1,168.76
  6. Step 6: Final answer
    x = 1,205.75

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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.