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Finding the Fourth Proportional to 290.71, 436.10 and 108.12

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Solution

The fourth proportional to 290.71, 436.10 and 108.12 is: 162.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.71 : 436.10 = 108.12 : x
  2. Step 2: Convert to fraction form
    290.71/436.10 = 108.12/x
  3. Step 3: Cross multiply
    290.71x = 436.10 × 108.12
  4. Step 4: Simplify right side
    290.71x = 47,151.13
  5. Step 5: Solve for x
    x = 47,151.13/290.71
  6. Step 6: Final answer
    x = 162.19

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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.