Home / 825,444-1,139,113.20-486,121.44

Finding the Fourth Proportional to 825,444, 1,139,113.20 and 486,121.44

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Solution

The fourth proportional to 825,444, 1,139,113.20 and 486,121.44 is: 670,847.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,444 : 1,139,113.20 = 486,121.44 : x
  2. Step 2: Convert to fraction form
    825,444/1,139,113.20 = 486,121.44/x
  3. Step 3: Cross multiply
    825,444x = 1,139,113.20 × 486,121.44
  4. Step 4: Simplify right side
    825,444x = 553,747,349,107.01
  5. Step 5: Solve for x
    x = 553,747,349,107.01/825,444
  6. Step 6: Final answer
    x = 670,847.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.