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Finding the Fourth Proportional to 314.06, 433.28 and 209.18

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Solution

The fourth proportional to 314.06, 433.28 and 209.18 is: 288.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.06 : 433.28 = 209.18 : x
  2. Step 2: Convert to fraction form
    314.06/433.28 = 209.18/x
  3. Step 3: Cross multiply
    314.06x = 433.28 × 209.18
  4. Step 4: Simplify right side
    314.06x = 90,633.51
  5. Step 5: Solve for x
    x = 90,633.51/314.06
  6. Step 6: Final answer
    x = 288.59

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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.