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Finding the Fourth Proportional to 949.91, 1,423.70 and 539.39

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Solution

The fourth proportional to 949.91, 1,423.70 and 539.39 is: 808.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.91 : 1,423.70 = 539.39 : x
  2. Step 2: Convert to fraction form
    949.91/1,423.70 = 539.39/x
  3. Step 3: Cross multiply
    949.91x = 1,423.70 × 539.39
  4. Step 4: Simplify right side
    949.91x = 767,919.73
  5. Step 5: Solve for x
    x = 767,919.73/949.91
  6. Step 6: Final answer
    x = 808.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.