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Finding the Fourth Proportional to 217,208.80, 325,813.20 and 164,720.80

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Solution

The fourth proportional to 217,208.80, 325,813.20 and 164,720.80 is: 247,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,208.80 : 325,813.20 = 164,720.80 : x
  2. Step 2: Convert to fraction form
    217,208.80/325,813.20 = 164,720.80/x
  3. Step 3: Cross multiply
    217,208.80x = 325,813.20 × 164,720.80
  4. Step 4: Simplify right side
    217,208.80x = 53,668,210,954.56
  5. Step 5: Solve for x
    x = 53,668,210,954.56/217,208.80
  6. Step 6: Final answer
    x = 247,081.20

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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.