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Finding the Fourth Proportional to 497.22, 685.99 and 290.22

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Solution

The fourth proportional to 497.22, 685.99 and 290.22 is: 400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.22 : 685.99 = 290.22 : x
  2. Step 2: Convert to fraction form
    497.22/685.99 = 290.22/x
  3. Step 3: Cross multiply
    497.22x = 685.99 × 290.22
  4. Step 4: Simplify right side
    497.22x = 199,083.14
  5. Step 5: Solve for x
    x = 199,083.14/497.22
  6. Step 6: Final answer
    x = 400.40

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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.