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Finding the Fourth Proportional to 315,744.88, 435,734.20 and 172,513.78

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Solution

The fourth proportional to 315,744.88, 435,734.20 and 172,513.78 is: 238,072.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,744.88 : 435,734.20 = 172,513.78 : x
  2. Step 2: Convert to fraction form
    315,744.88/435,734.20 = 172,513.78/x
  3. Step 3: Cross multiply
    315,744.88x = 435,734.20 × 172,513.78
  4. Step 4: Simplify right side
    315,744.88x = 75,170,153,917.28
  5. Step 5: Solve for x
    x = 75,170,153,917.28/315,744.88
  6. Step 6: Final answer
    x = 238,072.44

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1.5x scale

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.