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Finding the Fourth Proportional to 289.72, 435.22 and 225.72

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Solution

The fourth proportional to 289.72, 435.22 and 225.72 is: 339.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.72 : 435.22 = 225.72 : x
  2. Step 2: Convert to fraction form
    289.72/435.22 = 225.72/x
  3. Step 3: Cross multiply
    289.72x = 435.22 × 225.72
  4. Step 4: Simplify right side
    289.72x = 98,237.86
  5. Step 5: Solve for x
    x = 98,237.86/289.72
  6. Step 6: Final answer
    x = 339.08

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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.