Home / 812,477.87-1,121,218.75-449,901.71

Finding the Fourth Proportional to 812,477.87, 1,121,218.75 and 449,901.71

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Solution

The fourth proportional to 812,477.87, 1,121,218.75 and 449,901.71 is: 620,863.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,477.87 : 1,121,218.75 = 449,901.71 : x
  2. Step 2: Convert to fraction form
    812,477.87/1,121,218.75 = 449,901.71/x
  3. Step 3: Cross multiply
    812,477.87x = 1,121,218.75 × 449,901.71
  4. Step 4: Simplify right side
    812,477.87x = 504,438,232,909.06
  5. Step 5: Solve for x
    x = 504,438,232,909.06/812,477.87
  6. Step 6: Final answer
    x = 620,863.97

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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.