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Finding the Fourth Proportional to 561,449.76, 774,819.80 and 306,817.36

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Solution

The fourth proportional to 561,449.76, 774,819.80 and 306,817.36 is: 423,418.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,449.76 : 774,819.80 = 306,817.36 : x
  2. Step 2: Convert to fraction form
    561,449.76/774,819.80 = 306,817.36/x
  3. Step 3: Cross multiply
    561,449.76x = 774,819.80 × 306,817.36
  4. Step 4: Simplify right side
    561,449.76x = 237,728,165,511.73
  5. Step 5: Solve for x
    x = 237,728,165,511.73/561,449.76
  6. Step 6: Final answer
    x = 423,418.41

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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.