Home / 812,977.55-1,121,864.83-450,379.78

Finding the Fourth Proportional to 812,977.55, 1,121,864.83 and 450,379.78

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Solution

The fourth proportional to 812,977.55, 1,121,864.83 and 450,379.78 is: 621,499.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,977.55 : 1,121,864.83 = 450,379.78 : x
  2. Step 2: Convert to fraction form
    812,977.55/1,121,864.83 = 450,379.78/x
  3. Step 3: Cross multiply
    812,977.55x = 1,121,864.83 × 450,379.78
  4. Step 4: Simplify right side
    812,977.55x = 505,265,233,073.24
  5. Step 5: Solve for x
    x = 505,265,233,073.24/812,977.55
  6. Step 6: Final answer
    x = 621,499.62

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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.