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Finding the Fourth Proportional to 541,915.28, 812,898.84 and 261,668.24

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Solution

The fourth proportional to 541,915.28, 812,898.84 and 261,668.24 is: 392,514.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,915.28 : 812,898.84 = 261,668.24 : x
  2. Step 2: Convert to fraction form
    541,915.28/812,898.84 = 261,668.24/x
  3. Step 3: Cross multiply
    541,915.28x = 812,898.84 × 261,668.24
  4. Step 4: Simplify right side
    541,915.28x = 212,709,808,760.84
  5. Step 5: Solve for x
    x = 212,709,808,760.84/541,915.28
  6. Step 6: Final answer
    x = 392,514.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.