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Finding the Fourth Proportional to 3,279.78, 4,920.16 and 1,088

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Solution

The fourth proportional to 3,279.78, 4,920.16 and 1,088 is: 1,632.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.78 : 4,920.16 = 1,088 : x
  2. Step 2: Convert to fraction form
    3,279.78/4,920.16 = 1,088/x
  3. Step 3: Cross multiply
    3,279.78x = 4,920.16 × 1,088
  4. Step 4: Simplify right side
    3,279.78x = 5,353,134.08
  5. Step 5: Solve for x
    x = 5,353,134.08/3,279.78
  6. Step 6: Final answer
    x = 1,632.16

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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.