Home / 990,790.20-1,486,182.57-280,824.39

Finding the Fourth Proportional to 990,790.20, 1,486,182.57 and 280,824.39

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Solution

The fourth proportional to 990,790.20, 1,486,182.57 and 280,824.39 is: 421,235.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,790.20 : 1,486,182.57 = 280,824.39 : x
  2. Step 2: Convert to fraction form
    990,790.20/1,486,182.57 = 280,824.39/x
  3. Step 3: Cross multiply
    990,790.20x = 1,486,182.57 × 280,824.39
  4. Step 4: Simplify right side
    990,790.20x = 417,356,313,648.88
  5. Step 5: Solve for x
    x = 417,356,313,648.88/990,790.20
  6. Step 6: Final answer
    x = 421,235.81

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1.5x scale

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.