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Finding the Fourth Proportional to 371,381.15, 512,627.94 and 218,412.65

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Solution

The fourth proportional to 371,381.15, 512,627.94 and 218,412.65 is: 301,481.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,381.15 : 512,627.94 = 218,412.65 : x
  2. Step 2: Convert to fraction form
    371,381.15/512,627.94 = 218,412.65/x
  3. Step 3: Cross multiply
    371,381.15x = 512,627.94 × 218,412.65
  4. Step 4: Simplify right side
    371,381.15x = 111,964,428,121.01
  5. Step 5: Solve for x
    x = 111,964,428,121.01/371,381.15
  6. Step 6: Final answer
    x = 301,481.18

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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.