Home / 256,853.28-385,213.68-76,903.20

Finding the Fourth Proportional to 256,853.28, 385,213.68 and 76,903.20

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Solution

The fourth proportional to 256,853.28, 385,213.68 and 76,903.20 is: 115,334.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,853.28 : 385,213.68 = 76,903.20 : x
  2. Step 2: Convert to fraction form
    256,853.28/385,213.68 = 76,903.20/x
  3. Step 3: Cross multiply
    256,853.28x = 385,213.68 × 76,903.20
  4. Step 4: Simplify right side
    256,853.28x = 29,624,164,675.78
  5. Step 5: Solve for x
    x = 29,624,164,675.78/256,853.28
  6. Step 6: Final answer
    x = 115,334.97

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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.