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Finding the Fourth Proportional to 392,069.50, 540,856.40 and 256,182.88

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Solution

The fourth proportional to 392,069.50, 540,856.40 and 256,182.88 is: 353,402.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,069.50 : 540,856.40 = 256,182.88 : x
  2. Step 2: Convert to fraction form
    392,069.50/540,856.40 = 256,182.88/x
  3. Step 3: Cross multiply
    392,069.50x = 540,856.40 × 256,182.88
  4. Step 4: Simplify right side
    392,069.50x = 138,558,150,218.43
  5. Step 5: Solve for x
    x = 138,558,150,218.43/392,069.50
  6. Step 6: Final answer
    x = 353,402.01

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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.