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Finding the Fourth Proportional to 256,422.33, 353,875.05 and 154,479.43

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Solution

The fourth proportional to 256,422.33, 353,875.05 and 154,479.43 is: 213,188.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,422.33 : 353,875.05 = 154,479.43 : x
  2. Step 2: Convert to fraction form
    256,422.33/353,875.05 = 154,479.43/x
  3. Step 3: Cross multiply
    256,422.33x = 353,875.05 × 154,479.43
  4. Step 4: Simplify right side
    256,422.33x = 54,666,415,896.77
  5. Step 5: Solve for x
    x = 54,666,415,896.77/256,422.33
  6. Step 6: Final answer
    x = 213,188.98

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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.