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Finding the Fourth Proportional to 311,398.01, 429,799.20 and 203,905.61

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Solution

The fourth proportional to 311,398.01, 429,799.20 and 203,905.61 is: 281,435.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,398.01 : 429,799.20 = 203,905.61 : x
  2. Step 2: Convert to fraction form
    311,398.01/429,799.20 = 203,905.61/x
  3. Step 3: Cross multiply
    311,398.01x = 429,799.20 × 203,905.61
  4. Step 4: Simplify right side
    311,398.01x = 87,638,468,053.51
  5. Step 5: Solve for x
    x = 87,638,468,053.51/311,398.01
  6. Step 6: Final answer
    x = 281,435.54

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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.