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Finding the Fourth Proportional to 392,005.79, 540,395.35 and 277,081.66

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Solution

The fourth proportional to 392,005.79, 540,395.35 and 277,081.66 is: 381,967.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,005.79 : 540,395.35 = 277,081.66 : x
  2. Step 2: Convert to fraction form
    392,005.79/540,395.35 = 277,081.66/x
  3. Step 3: Cross multiply
    392,005.79x = 540,395.35 × 277,081.66
  4. Step 4: Simplify right side
    392,005.79x = 149,733,640,634.28
  5. Step 5: Solve for x
    x = 149,733,640,634.28/392,005.79
  6. Step 6: Final answer
    x = 381,967.93

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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.