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Finding the Fourth Proportional to 478.23, 716.85 and 272.36

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Solution

The fourth proportional to 478.23, 716.85 and 272.36 is: 408.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.23 : 716.85 = 272.36 : x
  2. Step 2: Convert to fraction form
    478.23/716.85 = 272.36/x
  3. Step 3: Cross multiply
    478.23x = 716.85 × 272.36
  4. Step 4: Simplify right side
    478.23x = 195,241.27
  5. Step 5: Solve for x
    x = 195,241.27/478.23
  6. Step 6: Final answer
    x = 408.26

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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.