Home / 1,280,949.89-1,921,524.03-428,024.49

Finding the Fourth Proportional to 1,280,949.89, 1,921,524.03 and 428,024.49

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Solution

The fourth proportional to 1,280,949.89, 1,921,524.03 and 428,024.49 is: 642,069.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,949.89 : 1,921,524.03 = 428,024.49 : x
  2. Step 2: Convert to fraction form
    1,280,949.89/1,921,524.03 = 428,024.49/x
  3. Step 3: Cross multiply
    1,280,949.89x = 1,921,524.03 × 428,024.49
  4. Step 4: Simplify right side
    1,280,949.89x = 822,459,342,963.50
  5. Step 5: Solve for x
    x = 822,459,342,963.50/1,280,949.89
  6. Step 6: Final answer
    x = 642,069.88

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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.