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Finding the Fourth Proportional to 342,843.71, 512,180.57 and 221,915.48

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Solution

The fourth proportional to 342,843.71, 512,180.57 and 221,915.48 is: 331,523.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,843.71 : 512,180.57 = 221,915.48 : x
  2. Step 2: Convert to fraction form
    342,843.71/512,180.57 = 221,915.48/x
  3. Step 3: Cross multiply
    342,843.71x = 512,180.57 × 221,915.48
  4. Step 4: Simplify right side
    342,843.71x = 113,660,795,032.11
  5. Step 5: Solve for x
    x = 113,660,795,032.11/342,843.71
  6. Step 6: Final answer
    x = 331,523.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.