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Finding the Fourth Proportional to 936.65, 1,405.00 and 351.59

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Solution

The fourth proportional to 936.65, 1,405.00 and 351.59 is: 527.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.65 : 1,405.00 = 351.59 : x
  2. Step 2: Convert to fraction form
    936.65/1,405.00 = 351.59/x
  3. Step 3: Cross multiply
    936.65x = 1,405.00 × 351.59
  4. Step 4: Simplify right side
    936.65x = 493,981.32
  5. Step 5: Solve for x
    x = 493,981.32/936.65
  6. Step 6: Final answer
    x = 527.39

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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.