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Finding the Fourth Proportional to 281,232, 421,848 and 84,240

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Solution

The fourth proportional to 281,232, 421,848 and 84,240 is: 126,360

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,232 : 421,848 = 84,240 : x
  2. Step 2: Convert to fraction form
    281,232/421,848 = 84,240/x
  3. Step 3: Cross multiply
    281,232x = 421,848 × 84,240
  4. Step 4: Simplify right side
    281,232x = 35,536,475,520
  5. Step 5: Solve for x
    x = 35,536,475,520/281,232
  6. Step 6: Final answer
    x = 126,360

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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.