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Finding the Fourth Proportional to 315,957.66, 436,021.62 and 172,718.28

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Solution

The fourth proportional to 315,957.66, 436,021.62 and 172,718.28 is: 238,351.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,957.66 : 436,021.62 = 172,718.28 : x
  2. Step 2: Convert to fraction form
    315,957.66/436,021.62 = 172,718.28/x
  3. Step 3: Cross multiply
    315,957.66x = 436,021.62 × 172,718.28
  4. Step 4: Simplify right side
    315,957.66x = 75,308,904,249.21
  5. Step 5: Solve for x
    x = 75,308,904,249.21/315,957.66
  6. Step 6: Final answer
    x = 238,351.25

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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.