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Finding the Fourth Proportional to 289.23, 433.47 and 220.50

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Solution

The fourth proportional to 289.23, 433.47 and 220.50 is: 330.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.23 : 433.47 = 220.50 : x
  2. Step 2: Convert to fraction form
    289.23/433.47 = 220.50/x
  3. Step 3: Cross multiply
    289.23x = 433.47 × 220.50
  4. Step 4: Simplify right side
    289.23x = 95,580.14
  5. Step 5: Solve for x
    x = 95,580.14/289.23
  6. Step 6: Final answer
    x = 330.46

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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.