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Finding the Fourth Proportional to 308,856.80, 463,285.20 and 218,655.20

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Solution

The fourth proportional to 308,856.80, 463,285.20 and 218,655.20 is: 327,982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,856.80 : 463,285.20 = 218,655.20 : x
  2. Step 2: Convert to fraction form
    308,856.80/463,285.20 = 218,655.20/x
  3. Step 3: Cross multiply
    308,856.80x = 463,285.20 × 218,655.20
  4. Step 4: Simplify right side
    308,856.80x = 101,299,718,063.04
  5. Step 5: Solve for x
    x = 101,299,718,063.04/308,856.80
  6. Step 6: Final answer
    x = 327,982.80

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Similar ratio
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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.