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Finding the Fourth Proportional to 315,955.80, 436,019.04 and 172,716.48

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Solution

The fourth proportional to 315,955.80, 436,019.04 and 172,716.48 is: 238,348.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,955.80 : 436,019.04 = 172,716.48 : x
  2. Step 2: Convert to fraction form
    315,955.80/436,019.04 = 172,716.48/x
  3. Step 3: Cross multiply
    315,955.80x = 436,019.04 × 172,716.48
  4. Step 4: Simplify right side
    315,955.80x = 75,307,673,801.78
  5. Step 5: Solve for x
    x = 75,307,673,801.78/315,955.80
  6. Step 6: Final answer
    x = 238,348.76

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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.