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Finding the Fourth Proportional to 272.51, 376.20 and 210.20

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Solution

The fourth proportional to 272.51, 376.20 and 210.20 is: 290.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.51 : 376.20 = 210.20 : x
  2. Step 2: Convert to fraction form
    272.51/376.20 = 210.20/x
  3. Step 3: Cross multiply
    272.51x = 376.20 × 210.20
  4. Step 4: Simplify right side
    272.51x = 79,074.57
  5. Step 5: Solve for x
    x = 79,074.57/272.51
  6. Step 6: Final answer
    x = 290.18

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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.