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Finding the Fourth Proportional to 315,643.97, 435,025.38 and 238,979.38

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Solution

The fourth proportional to 315,643.97, 435,025.38 and 238,979.38 is: 329,365.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,643.97 : 435,025.38 = 238,979.38 : x
  2. Step 2: Convert to fraction form
    315,643.97/435,025.38 = 238,979.38/x
  3. Step 3: Cross multiply
    315,643.97x = 435,025.38 × 238,979.38
  4. Step 4: Simplify right side
    315,643.97x = 103,962,096,220.95
  5. Step 5: Solve for x
    x = 103,962,096,220.95/315,643.97
  6. Step 6: Final answer
    x = 329,365.06

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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.