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Finding the Fourth Proportional to 315,839.33, 435,859.41 and 172,599.38

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Solution

The fourth proportional to 315,839.33, 435,859.41 and 172,599.38 is: 238,187.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,839.33 : 435,859.41 = 172,599.38 : x
  2. Step 2: Convert to fraction form
    315,839.33/435,859.41 = 172,599.38/x
  3. Step 3: Cross multiply
    315,839.33x = 435,859.41 × 172,599.38
  4. Step 4: Simplify right side
    315,839.33x = 75,229,063,933.17
  5. Step 5: Solve for x
    x = 75,229,063,933.17/315,839.33
  6. Step 6: Final answer
    x = 238,187.76

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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.