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Finding the Fourth Proportional to 561,217.85, 774,451.68 and 306,519.83

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Solution

The fourth proportional to 561,217.85, 774,451.68 and 306,519.83 is: 422,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,217.85 : 774,451.68 = 306,519.83 : x
  2. Step 2: Convert to fraction form
    561,217.85/774,451.68 = 306,519.83/x
  3. Step 3: Cross multiply
    561,217.85x = 774,451.68 × 306,519.83
  4. Step 4: Simplify right side
    561,217.85x = 237,384,797,296.81
  5. Step 5: Solve for x
    x = 237,384,797,296.81/561,217.85
  6. Step 6: Final answer
    x = 422,981.55

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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.