Home / 990,947.90-1,486,478.34-280,920.12

Finding the Fourth Proportional to 990,947.90, 1,486,478.34 and 280,920.12

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Solution

The fourth proportional to 990,947.90, 1,486,478.34 and 280,920.12 is: 421,396.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,947.90 : 1,486,478.34 = 280,920.12 : x
  2. Step 2: Convert to fraction form
    990,947.90/1,486,478.34 = 280,920.12/x
  3. Step 3: Cross multiply
    990,947.90x = 1,486,478.34 × 280,920.12
  4. Step 4: Simplify right side
    990,947.90x = 417,581,673,650.20
  5. Step 5: Solve for x
    x = 417,581,673,650.20/990,947.90
  6. Step 6: Final answer
    x = 421,396.19

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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.