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Finding the Fourth Proportional to 1,147.08, 1,720.62 and 725.07

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Solution

The fourth proportional to 1,147.08, 1,720.62 and 725.07 is: 1,087.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.08 : 1,720.62 = 725.07 : x
  2. Step 2: Convert to fraction form
    1,147.08/1,720.62 = 725.07/x
  3. Step 3: Cross multiply
    1,147.08x = 1,720.62 × 725.07
  4. Step 4: Simplify right side
    1,147.08x = 1,247,569.94
  5. Step 5: Solve for x
    x = 1,247,569.94/1,147.08
  6. Step 6: Final answer
    x = 1,087.61

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Similar ratio
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1.5x scale

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.