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Finding the Fourth Proportional to 272.48, 376.21 and 210.21

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Solution

The fourth proportional to 272.48, 376.21 and 210.21 is: 290.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.48 : 376.21 = 210.21 : x
  2. Step 2: Convert to fraction form
    272.48/376.21 = 210.21/x
  3. Step 3: Cross multiply
    272.48x = 376.21 × 210.21
  4. Step 4: Simplify right side
    272.48x = 79,083.10
  5. Step 5: Solve for x
    x = 79,083.10/272.48
  6. Step 6: Final answer
    x = 290.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.