Home / 1,280,950.38-1,921,524.79-428,024.98

Finding the Fourth Proportional to 1,280,950.38, 1,921,524.79 and 428,024.98

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Solution

The fourth proportional to 1,280,950.38, 1,921,524.79 and 428,024.98 is: 642,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,950.38 : 1,921,524.79 = 428,024.98 : x
  2. Step 2: Convert to fraction form
    1,280,950.38/1,921,524.79 = 428,024.98/x
  3. Step 3: Cross multiply
    1,280,950.38x = 1,921,524.79 × 428,024.98
  4. Step 4: Simplify right side
    1,280,950.38x = 822,460,609,809.25
  5. Step 5: Solve for x
    x = 822,460,609,809.25/1,280,950.38
  6. Step 6: Final answer
    x = 642,070.62

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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.