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Finding the Fourth Proportional to 289.25, 433.50 and 208.25

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Solution

The fourth proportional to 289.25, 433.50 and 208.25 is: 312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.25 : 433.50 = 208.25 : x
  2. Step 2: Convert to fraction form
    289.25/433.50 = 208.25/x
  3. Step 3: Cross multiply
    289.25x = 433.50 × 208.25
  4. Step 4: Simplify right side
    289.25x = 90,274.21
  5. Step 5: Solve for x
    x = 90,274.21/289.25
  6. Step 6: Final answer
    x = 312.10

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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.