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Finding the Fourth Proportional to 315,272.97, 435,087.20 and 172,040.87

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Solution

The fourth proportional to 315,272.97, 435,087.20 and 172,040.87 is: 237,422.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,272.97 : 435,087.20 = 172,040.87 : x
  2. Step 2: Convert to fraction form
    315,272.97/435,087.20 = 172,040.87/x
  3. Step 3: Cross multiply
    315,272.97x = 435,087.20 × 172,040.87
  4. Step 4: Simplify right side
    315,272.97x = 74,852,780,413.86
  5. Step 5: Solve for x
    x = 74,852,780,413.86/315,272.97
  6. Step 6: Final answer
    x = 237,422.13

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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.