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Finding the Fourth Proportional to 308,707.35, 425,882.71 and 218,140.95

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Solution

The fourth proportional to 308,707.35, 425,882.71 and 218,140.95 is: 300,940.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,707.35 : 425,882.71 = 218,140.95 : x
  2. Step 2: Convert to fraction form
    308,707.35/425,882.71 = 218,140.95/x
  3. Step 3: Cross multiply
    308,707.35x = 425,882.71 × 218,140.95
  4. Step 4: Simplify right side
    308,707.35x = 92,902,458,422.12
  5. Step 5: Solve for x
    x = 92,902,458,422.12/308,707.35
  6. Step 6: Final answer
    x = 300,940.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.