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Finding the Fourth Proportional to 256,958.13, 385,409.50 and 67,437.50

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Solution

The fourth proportional to 256,958.13, 385,409.50 and 67,437.50 is: 101,148.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,958.13 : 385,409.50 = 67,437.50 : x
  2. Step 2: Convert to fraction form
    256,958.13/385,409.50 = 67,437.50/x
  3. Step 3: Cross multiply
    256,958.13x = 385,409.50 × 67,437.50
  4. Step 4: Simplify right side
    256,958.13x = 25,991,051,229.20
  5. Step 5: Solve for x
    x = 25,991,051,229.20/256,958.13
  6. Step 6: Final answer
    x = 101,148.97

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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.