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Finding the Fourth Proportional to 436.22, 654.55 and 290.07

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Solution

The fourth proportional to 436.22, 654.55 and 290.07 is: 435.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.22 : 654.55 = 290.07 : x
  2. Step 2: Convert to fraction form
    436.22/654.55 = 290.07/x
  3. Step 3: Cross multiply
    436.22x = 654.55 × 290.07
  4. Step 4: Simplify right side
    436.22x = 189,860.60
  5. Step 5: Solve for x
    x = 189,860.60/436.22
  6. Step 6: Final answer
    x = 435.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.