Home / 812,920.65-1,121,830.55-445,399.35

Finding the Fourth Proportional to 812,920.65, 1,121,830.55 and 445,399.35

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Solution

The fourth proportional to 812,920.65, 1,121,830.55 and 445,399.35 is: 614,651.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,920.65 : 1,121,830.55 = 445,399.35 : x
  2. Step 2: Convert to fraction form
    812,920.65/1,121,830.55 = 445,399.35/x
  3. Step 3: Cross multiply
    812,920.65x = 1,121,830.55 × 445,399.35
  4. Step 4: Simplify right side
    812,920.65x = 499,662,589,943.99
  5. Step 5: Solve for x
    x = 499,662,589,943.99/812,920.65
  6. Step 6: Final answer
    x = 614,651.13

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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.