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Finding the Fourth Proportional to 4,609.68, 6,917.04 and 4,279.20

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Solution

The fourth proportional to 4,609.68, 6,917.04 and 4,279.20 is: 6,421.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,609.68 : 6,917.04 = 4,279.20 : x
  2. Step 2: Convert to fraction form
    4,609.68/6,917.04 = 4,279.20/x
  3. Step 3: Cross multiply
    4,609.68x = 6,917.04 × 4,279.20
  4. Step 4: Simplify right side
    4,609.68x = 29,599,397.57
  5. Step 5: Solve for x
    x = 29,599,397.57/4,609.68
  6. Step 6: Final answer
    x = 6,421.14

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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.