Home / 819,998.70-1,230,228.45-399,288.30

Finding the Fourth Proportional to 819,998.70, 1,230,228.45 and 399,288.30

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Solution

The fourth proportional to 819,998.70, 1,230,228.45 and 399,288.30 is: 599,044.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,998.70 : 1,230,228.45 = 399,288.30 : x
  2. Step 2: Convert to fraction form
    819,998.70/1,230,228.45 = 399,288.30/x
  3. Step 3: Cross multiply
    819,998.70x = 1,230,228.45 × 399,288.30
  4. Step 4: Simplify right side
    819,998.70x = 491,215,826,412.14
  5. Step 5: Solve for x
    x = 491,215,826,412.14/819,998.70
  6. Step 6: Final answer
    x = 599,044.64

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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.