Home / 819,919.20-1,230,109.20-399,208.80

Finding the Fourth Proportional to 819,919.20, 1,230,109.20 and 399,208.80

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Solution

The fourth proportional to 819,919.20, 1,230,109.20 and 399,208.80 is: 598,925.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,919.20 : 1,230,109.20 = 399,208.80 : x
  2. Step 2: Convert to fraction form
    819,919.20/1,230,109.20 = 399,208.80/x
  3. Step 3: Cross multiply
    819,919.20x = 1,230,109.20 × 399,208.80
  4. Step 4: Simplify right side
    819,919.20x = 491,070,417,600.96
  5. Step 5: Solve for x
    x = 491,070,417,600.96/819,919.20
  6. Step 6: Final answer
    x = 598,925.38

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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.