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Finding the Fourth Proportional to 256,937.44, 385,459.34 and 77,015.60

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Solution

The fourth proportional to 256,937.44, 385,459.34 and 77,015.60 is: 115,539.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,937.44 : 385,459.34 = 77,015.60 : x
  2. Step 2: Convert to fraction form
    256,937.44/385,459.34 = 77,015.60/x
  3. Step 3: Cross multiply
    256,937.44x = 385,459.34 × 77,015.60
  4. Step 4: Simplify right side
    256,937.44x = 29,686,380,418.41
  5. Step 5: Solve for x
    x = 29,686,380,418.41/256,937.44
  6. Step 6: Final answer
    x = 115,539.34

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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.