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Finding the Fourth Proportional to 256,959.93, 385,412.20 and 67,439.30

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Solution

The fourth proportional to 256,959.93, 385,412.20 and 67,439.30 is: 101,151.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,959.93 : 385,412.20 = 67,439.30 : x
  2. Step 2: Convert to fraction form
    256,959.93/385,412.20 = 67,439.30/x
  3. Step 3: Cross multiply
    256,959.93x = 385,412.20 × 67,439.30
  4. Step 4: Simplify right side
    256,959.93x = 25,991,926,715.20
  5. Step 5: Solve for x
    x = 25,991,926,715.20/256,959.93
  6. Step 6: Final answer
    x = 101,151.67

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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.