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Finding the Fourth Proportional to 256,693.32, 385,078.05 and 88,257.06

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Solution

The fourth proportional to 256,693.32, 385,078.05 and 88,257.06 is: 132,398.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,693.32 : 385,078.05 = 88,257.06 : x
  2. Step 2: Convert to fraction form
    256,693.32/385,078.05 = 88,257.06/x
  3. Step 3: Cross multiply
    256,693.32x = 385,078.05 × 88,257.06
  4. Step 4: Simplify right side
    256,693.32x = 33,985,856,563.53
  5. Step 5: Solve for x
    x = 33,985,856,563.53/256,693.32
  6. Step 6: Final answer
    x = 132,398.68

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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.