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Finding the Fourth Proportional to 561,205.65, 774,451.22 and 306,557.85

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Solution

The fourth proportional to 561,205.65, 774,451.22 and 306,557.85 is: 423,042.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,205.65 : 774,451.22 = 306,557.85 : x
  2. Step 2: Convert to fraction form
    561,205.65/774,451.22 = 306,557.85/x
  3. Step 3: Cross multiply
    561,205.65x = 774,451.22 × 306,557.85
  4. Step 4: Simplify right side
    561,205.65x = 237,414,099,400.29
  5. Step 5: Solve for x
    x = 237,414,099,400.29/561,205.65
  6. Step 6: Final answer
    x = 423,042.96

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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.