Home / 1,391,320.80-2,086,981.20-682,732.80

Finding the Fourth Proportional to 1,391,320.80, 2,086,981.20 and 682,732.80

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Solution

The fourth proportional to 1,391,320.80, 2,086,981.20 and 682,732.80 is: 1,024,099.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,320.80 : 2,086,981.20 = 682,732.80 : x
  2. Step 2: Convert to fraction form
    1,391,320.80/2,086,981.20 = 682,732.80/x
  3. Step 3: Cross multiply
    1,391,320.80x = 2,086,981.20 × 682,732.80
  4. Step 4: Simplify right side
    1,391,320.80x = 1,424,850,518,223.36
  5. Step 5: Solve for x
    x = 1,424,850,518,223.36/1,391,320.80
  6. Step 6: Final answer
    x = 1,024,099.20

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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.