Home / 812,357.85-1,121,088.87-449,781.74

Finding the Fourth Proportional to 812,357.85, 1,121,088.87 and 449,781.74

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Solution

The fourth proportional to 812,357.85, 1,121,088.87 and 449,781.74 is: 620,718.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,357.85 : 1,121,088.87 = 449,781.74 : x
  2. Step 2: Convert to fraction form
    812,357.85/1,121,088.87 = 449,781.74/x
  3. Step 3: Cross multiply
    812,357.85x = 1,121,088.87 × 449,781.74
  4. Step 4: Simplify right side
    812,357.85x = 504,245,297,037.79
  5. Step 5: Solve for x
    x = 504,245,297,037.79/812,357.85
  6. Step 6: Final answer
    x = 620,718.19

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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.