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Finding the Fourth Proportional to 280,886.97, 387,623.93 and 153,562.56

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Solution

The fourth proportional to 280,886.97, 387,623.93 and 153,562.56 is: 211,916.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,886.97 : 387,623.93 = 153,562.56 : x
  2. Step 2: Convert to fraction form
    280,886.97/387,623.93 = 153,562.56/x
  3. Step 3: Cross multiply
    280,886.97x = 387,623.93 × 153,562.56
  4. Step 4: Simplify right side
    280,886.97x = 59,524,522,240.25
  5. Step 5: Solve for x
    x = 59,524,522,240.25/280,886.97
  6. Step 6: Final answer
    x = 211,916.28

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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.