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Finding the Fourth Proportional to 209.99, 314.71 and 100.33

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Solution

The fourth proportional to 209.99, 314.71 and 100.33 is: 150.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.99 : 314.71 = 100.33 : x
  2. Step 2: Convert to fraction form
    209.99/314.71 = 100.33/x
  3. Step 3: Cross multiply
    209.99x = 314.71 × 100.33
  4. Step 4: Simplify right side
    209.99x = 31,573.82
  5. Step 5: Solve for x
    x = 31,573.82/209.99
  6. Step 6: Final answer
    x = 150.36

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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.