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Finding the Fourth Proportional to 256,982.77, 385,457.74 and 79,474.92

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Solution

The fourth proportional to 256,982.77, 385,457.74 and 79,474.92 is: 119,207.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,982.77 : 385,457.74 = 79,474.92 : x
  2. Step 2: Convert to fraction form
    256,982.77/385,457.74 = 79,474.92/x
  3. Step 3: Cross multiply
    256,982.77x = 385,457.74 × 79,474.92
  4. Step 4: Simplify right side
    256,982.77x = 30,634,223,049.88
  5. Step 5: Solve for x
    x = 30,634,223,049.88/256,982.77
  6. Step 6: Final answer
    x = 119,207.30

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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.