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Finding the Fourth Proportional to 936.99, 1,405.65 and 359.82

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Solution

The fourth proportional to 936.99, 1,405.65 and 359.82 is: 539.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.99 : 1,405.65 = 359.82 : x
  2. Step 2: Convert to fraction form
    936.99/1,405.65 = 359.82/x
  3. Step 3: Cross multiply
    936.99x = 1,405.65 × 359.82
  4. Step 4: Simplify right side
    936.99x = 505,780.98
  5. Step 5: Solve for x
    x = 505,780.98/936.99
  6. Step 6: Final answer
    x = 539.79

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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.