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Finding the Fourth Proportional to 2,187.32, 3,279.76 and 725.67

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Solution

The fourth proportional to 2,187.32, 3,279.76 and 725.67 is: 1,088.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.32 : 3,279.76 = 725.67 : x
  2. Step 2: Convert to fraction form
    2,187.32/3,279.76 = 725.67/x
  3. Step 3: Cross multiply
    2,187.32x = 3,279.76 × 725.67
  4. Step 4: Simplify right side
    2,187.32x = 2,380,021.63
  5. Step 5: Solve for x
    x = 2,380,021.63/2,187.32
  6. Step 6: Final answer
    x = 1,088.10

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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.