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Finding the Fourth Proportional to 315,442.86, 435,318.60 and 172,203.97

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Solution

The fourth proportional to 315,442.86, 435,318.60 and 172,203.97 is: 237,645.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,442.86 : 435,318.60 = 172,203.97 : x
  2. Step 2: Convert to fraction form
    315,442.86/435,318.60 = 172,203.97/x
  3. Step 3: Cross multiply
    315,442.86x = 435,318.60 × 172,203.97
  4. Step 4: Simplify right side
    315,442.86x = 74,963,591,134.84
  5. Step 5: Solve for x
    x = 74,963,591,134.84/315,442.86
  6. Step 6: Final answer
    x = 237,645.55

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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.