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Finding the Fourth Proportional to 297.68, 410.88 and 210.20

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Solution

The fourth proportional to 297.68, 410.88 and 210.20 is: 290.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.68 : 410.88 = 210.20 : x
  2. Step 2: Convert to fraction form
    297.68/410.88 = 210.20/x
  3. Step 3: Cross multiply
    297.68x = 410.88 × 210.20
  4. Step 4: Simplify right side
    297.68x = 86,366.98
  5. Step 5: Solve for x
    x = 86,366.98/297.68
  6. Step 6: Final answer
    x = 290.13

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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.