Home / 990,991.35-1,486,167.17-280,828.71

Finding the Fourth Proportional to 990,991.35, 1,486,167.17 and 280,828.71

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Solution

The fourth proportional to 990,991.35, 1,486,167.17 and 280,828.71 is: 421,152.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,991.35 : 1,486,167.17 = 280,828.71 : x
  2. Step 2: Convert to fraction form
    990,991.35/1,486,167.17 = 280,828.71/x
  3. Step 3: Cross multiply
    990,991.35x = 1,486,167.17 × 280,828.71
  4. Step 4: Simplify right side
    990,991.35x = 417,358,407,791.31
  5. Step 5: Solve for x
    x = 417,358,407,791.31/990,991.35
  6. Step 6: Final answer
    x = 421,152.42

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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.