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Finding the Fourth Proportional to 281,292, 421,938 and 84,300

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Solution

The fourth proportional to 281,292, 421,938 and 84,300 is: 126,450

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,292 : 421,938 = 84,300 : x
  2. Step 2: Convert to fraction form
    281,292/421,938 = 84,300/x
  3. Step 3: Cross multiply
    281,292x = 421,938 × 84,300
  4. Step 4: Simplify right side
    281,292x = 35,569,373,400
  5. Step 5: Solve for x
    x = 35,569,373,400/281,292
  6. Step 6: Final answer
    x = 126,450

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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.