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Finding the Fourth Proportional to 210.62, 290.77 and 210.22

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Solution

The fourth proportional to 210.62, 290.77 and 210.22 is: 290.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.62 : 290.77 = 210.22 : x
  2. Step 2: Convert to fraction form
    210.62/290.77 = 210.22/x
  3. Step 3: Cross multiply
    210.62x = 290.77 × 210.22
  4. Step 4: Simplify right side
    210.62x = 61,124.42
  5. Step 5: Solve for x
    x = 61,124.42/210.62
  6. Step 6: Final answer
    x = 290.21

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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.