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Finding the Fourth Proportional to 261,889.20, 361,389.42 and 154,454.04

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Solution

The fourth proportional to 261,889.20, 361,389.42 and 154,454.04 is: 213,136.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,889.20 : 361,389.42 = 154,454.04 : x
  2. Step 2: Convert to fraction form
    261,889.20/361,389.42 = 154,454.04/x
  3. Step 3: Cross multiply
    261,889.20x = 361,389.42 × 154,454.04
  4. Step 4: Simplify right side
    261,889.20x = 55,818,055,932.26
  5. Step 5: Solve for x
    x = 55,818,055,932.26/261,889.20
  6. Step 6: Final answer
    x = 213,136.15

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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.