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Finding the Fourth Proportional to 217,218.60, 325,439.10 and 186,114.60

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Solution

The fourth proportional to 217,218.60, 325,439.10 and 186,114.60 is: 278,838.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,218.60 : 325,439.10 = 186,114.60 : x
  2. Step 2: Convert to fraction form
    217,218.60/325,439.10 = 186,114.60/x
  3. Step 3: Cross multiply
    217,218.60x = 325,439.10 × 186,114.60
  4. Step 4: Simplify right side
    217,218.60x = 60,568,967,920.86
  5. Step 5: Solve for x
    x = 60,568,967,920.86/217,218.60
  6. Step 6: Final answer
    x = 278,838.77

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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.