Home / 428,625.45-642,938.09-144,292.14

Finding the Fourth Proportional to 428,625.45, 642,938.09 and 144,292.14

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Solution

The fourth proportional to 428,625.45, 642,938.09 and 144,292.14 is: 216,438.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,625.45 : 642,938.09 = 144,292.14 : x
  2. Step 2: Convert to fraction form
    428,625.45/642,938.09 = 144,292.14/x
  3. Step 3: Cross multiply
    428,625.45x = 642,938.09 × 144,292.14
  4. Step 4: Simplify right side
    428,625.45x = 92,770,912,172.15
  5. Step 5: Solve for x
    x = 92,770,912,172.15/428,625.45
  6. Step 6: Final answer
    x = 216,438.18

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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.