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Finding the Fourth Proportional to 342,915.58, 512,287.71 and 221,987.38

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Solution

The fourth proportional to 342,915.58, 512,287.71 and 221,987.38 is: 331,630.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,915.58 : 512,287.71 = 221,987.38 : x
  2. Step 2: Convert to fraction form
    342,915.58/512,287.71 = 221,987.38/x
  3. Step 3: Cross multiply
    342,915.58x = 512,287.71 × 221,987.38
  4. Step 4: Simplify right side
    342,915.58x = 113,721,407,104.07
  5. Step 5: Solve for x
    x = 113,721,407,104.07/342,915.58
  6. Step 6: Final answer
    x = 331,630.91

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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.