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Finding the Fourth Proportional to 286,989.22, 396,045.12 and 159,664.78

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Solution

The fourth proportional to 286,989.22, 396,045.12 and 159,664.78 is: 220,337.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,989.22 : 396,045.12 = 159,664.78 : x
  2. Step 2: Convert to fraction form
    286,989.22/396,045.12 = 159,664.78/x
  3. Step 3: Cross multiply
    286,989.22x = 396,045.12 × 159,664.78
  4. Step 4: Simplify right side
    286,989.22x = 63,234,456,954.87
  5. Step 5: Solve for x
    x = 63,234,456,954.87/286,989.22
  6. Step 6: Final answer
    x = 220,337.39

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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.