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Finding the Fourth Proportional to 305,878.92, 421,995.15 and 225,497.58

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Solution

The fourth proportional to 305,878.92, 421,995.15 and 225,497.58 is: 311,099.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,878.92 : 421,995.15 = 225,497.58 : x
  2. Step 2: Convert to fraction form
    305,878.92/421,995.15 = 225,497.58/x
  3. Step 3: Cross multiply
    305,878.92x = 421,995.15 × 225,497.58
  4. Step 4: Simplify right side
    305,878.92x = 95,158,885,096.74
  5. Step 5: Solve for x
    x = 95,158,885,096.74/305,878.92
  6. Step 6: Final answer
    x = 311,099.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.