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Finding the Fourth Proportional to 1,168.93, 1,751.01 and 728.74

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Solution

The fourth proportional to 1,168.93, 1,751.01 and 728.74 is: 1,091.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.93 : 1,751.01 = 728.74 : x
  2. Step 2: Convert to fraction form
    1,168.93/1,751.01 = 728.74/x
  3. Step 3: Cross multiply
    1,168.93x = 1,751.01 × 728.74
  4. Step 4: Simplify right side
    1,168.93x = 1,276,031.03
  5. Step 5: Solve for x
    x = 1,276,031.03/1,168.93
  6. Step 6: Final answer
    x = 1,091.62

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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.