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Finding the Fourth Proportional to 436.47, 655.00 and 290.39

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Solution

The fourth proportional to 436.47, 655.00 and 290.39 is: 435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.47 : 655.00 = 290.39 : x
  2. Step 2: Convert to fraction form
    436.47/655.00 = 290.39/x
  3. Step 3: Cross multiply
    436.47x = 655.00 × 290.39
  4. Step 4: Simplify right side
    436.47x = 190,201.45
  5. Step 5: Solve for x
    x = 190,201.45/436.47
  6. Step 6: Final answer
    x = 435.78

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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.