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Finding the Fourth Proportional to 371,422.22, 511,414.94 and 290,079.05

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Solution

The fourth proportional to 371,422.22, 511,414.94 and 290,079.05 is: 399,412.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,422.22 : 511,414.94 = 290,079.05 : x
  2. Step 2: Convert to fraction form
    371,422.22/511,414.94 = 290,079.05/x
  3. Step 3: Cross multiply
    371,422.22x = 511,414.94 × 290,079.05
  4. Step 4: Simplify right side
    371,422.22x = 148,350,755,943.54
  5. Step 5: Solve for x
    x = 148,350,755,943.54/371,422.22
  6. Step 6: Final answer
    x = 399,412.72

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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.