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Finding the Fourth Proportional to 256,956.92, 385,407.72 and 67,436.28

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Solution

The fourth proportional to 256,956.92, 385,407.72 and 67,436.28 is: 101,147.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,956.92 : 385,407.72 = 67,436.28 : x
  2. Step 2: Convert to fraction form
    256,956.92/385,407.72 = 67,436.28/x
  3. Step 3: Cross multiply
    256,956.92x = 385,407.72 × 67,436.28
  4. Step 4: Simplify right side
    256,956.92x = 25,990,462,920.08
  5. Step 5: Solve for x
    x = 25,990,462,920.08/256,956.92
  6. Step 6: Final answer
    x = 101,147.16

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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.