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Finding the Fourth Proportional to 291,988.88, 402,737.20 and 189,825.92

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Solution

The fourth proportional to 291,988.88, 402,737.20 and 189,825.92 is: 261,824.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,988.88 : 402,737.20 = 189,825.92 : x
  2. Step 2: Convert to fraction form
    291,988.88/402,737.20 = 189,825.92/x
  3. Step 3: Cross multiply
    291,988.88x = 402,737.20 × 189,825.92
  4. Step 4: Simplify right side
    291,988.88x = 76,449,959,508.22
  5. Step 5: Solve for x
    x = 76,449,959,508.22/291,988.88
  6. Step 6: Final answer
    x = 261,824.90

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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.