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Finding the Fourth Proportional to 356,346.79, 491,766.49 and 203,381.89

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Solution

The fourth proportional to 356,346.79, 491,766.49 and 203,381.89 is: 280,671.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,346.79 : 491,766.49 = 203,381.89 : x
  2. Step 2: Convert to fraction form
    356,346.79/491,766.49 = 203,381.89/x
  3. Step 3: Cross multiply
    356,346.79x = 491,766.49 × 203,381.89
  4. Step 4: Simplify right side
    356,346.79x = 100,016,397,199.68
  5. Step 5: Solve for x
    x = 100,016,397,199.68/356,346.79
  6. Step 6: Final answer
    x = 280,671.52

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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.