Home / 812,479.87-1,121,221.51-449,903.71

Finding the Fourth Proportional to 812,479.87, 1,121,221.51 and 449,903.71

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Solution

The fourth proportional to 812,479.87, 1,121,221.51 and 449,903.71 is: 620,866.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,479.87 : 1,121,221.51 = 449,903.71 : x
  2. Step 2: Convert to fraction form
    812,479.87/1,121,221.51 = 449,903.71/x
  3. Step 3: Cross multiply
    812,479.87x = 1,121,221.51 × 449,903.71
  4. Step 4: Simplify right side
    812,479.87x = 504,441,717,080.80
  5. Step 5: Solve for x
    x = 504,441,717,080.80/812,479.87
  6. Step 6: Final answer
    x = 620,866.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.