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Finding the Fourth Proportional to 289.08, 436.05 and 272.25

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Solution

The fourth proportional to 289.08, 436.05 and 272.25 is: 410.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.08 : 436.05 = 272.25 : x
  2. Step 2: Convert to fraction form
    289.08/436.05 = 272.25/x
  3. Step 3: Cross multiply
    289.08x = 436.05 × 272.25
  4. Step 4: Simplify right side
    289.08x = 118,714.61
  5. Step 5: Solve for x
    x = 118,714.61/289.08
  6. Step 6: Final answer
    x = 410.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.