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Finding the Fourth Proportional to 256,364.32, 383,789.20 and 189,359.52

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Solution

The fourth proportional to 256,364.32, 383,789.20 and 189,359.52 is: 283,479.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,364.32 : 383,789.20 = 189,359.52 : x
  2. Step 2: Convert to fraction form
    256,364.32/383,789.20 = 189,359.52/x
  3. Step 3: Cross multiply
    256,364.32x = 383,789.20 × 189,359.52
  4. Step 4: Simplify right side
    256,364.32x = 72,674,138,693.18
  5. Step 5: Solve for x
    x = 72,674,138,693.18/256,364.32
  6. Step 6: Final answer
    x = 283,479.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.