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Finding the Fourth Proportional to 314.42, 433.80 and 209.52

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Solution

The fourth proportional to 314.42, 433.80 and 209.52 is: 289.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.42 : 433.80 = 209.52 : x
  2. Step 2: Convert to fraction form
    314.42/433.80 = 209.52/x
  3. Step 3: Cross multiply
    314.42x = 433.80 × 209.52
  4. Step 4: Simplify right side
    314.42x = 90,889.78
  5. Step 5: Solve for x
    x = 90,889.78/314.42
  6. Step 6: Final answer
    x = 289.08

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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.