Home / 280,471.07-387,050.06-153,146.78

Finding the Fourth Proportional to 280,471.07, 387,050.06 and 153,146.78

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Solution

The fourth proportional to 280,471.07, 387,050.06 and 153,146.78 is: 211,342.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,471.07 : 387,050.06 = 153,146.78 : x
  2. Step 2: Convert to fraction form
    280,471.07/387,050.06 = 153,146.78/x
  3. Step 3: Cross multiply
    280,471.07x = 387,050.06 × 153,146.78
  4. Step 4: Simplify right side
    280,471.07x = 59,275,469,622.07
  5. Step 5: Solve for x
    x = 59,275,469,622.07/280,471.07
  6. Step 6: Final answer
    x = 211,342.54

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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.