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Finding the Fourth Proportional to 750.35, 1,125.74 and 668.65

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Solution

The fourth proportional to 750.35, 1,125.74 and 668.65 is: 1,003.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.35 : 1,125.74 = 668.65 : x
  2. Step 2: Convert to fraction form
    750.35/1,125.74 = 668.65/x
  3. Step 3: Cross multiply
    750.35x = 1,125.74 × 668.65
  4. Step 4: Simplify right side
    750.35x = 752,719.89
  5. Step 5: Solve for x
    x = 752,719.89/750.35
  6. Step 6: Final answer
    x = 1,003.16

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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.