Home / 815,110.20-1,222,665.30-394,428.60

Finding the Fourth Proportional to 815,110.20, 1,222,665.30 and 394,428.60

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Solution

The fourth proportional to 815,110.20, 1,222,665.30 and 394,428.60 is: 591,642.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,110.20 : 1,222,665.30 = 394,428.60 : x
  2. Step 2: Convert to fraction form
    815,110.20/1,222,665.30 = 394,428.60/x
  3. Step 3: Cross multiply
    815,110.20x = 1,222,665.30 × 394,428.60
  4. Step 4: Simplify right side
    815,110.20x = 482,254,162,547.58
  5. Step 5: Solve for x
    x = 482,254,162,547.58/815,110.20
  6. Step 6: Final answer
    x = 591,642.90

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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.