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Finding the Fourth Proportional to 1,080.22, 1,490.67 and 608.19

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Solution

The fourth proportional to 1,080.22, 1,490.67 and 608.19 is: 839.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.22 : 1,490.67 = 608.19 : x
  2. Step 2: Convert to fraction form
    1,080.22/1,490.67 = 608.19/x
  3. Step 3: Cross multiply
    1,080.22x = 1,490.67 × 608.19
  4. Step 4: Simplify right side
    1,080.22x = 906,613.38
  5. Step 5: Solve for x
    x = 906,613.38/1,080.22
  6. Step 6: Final answer
    x = 839.29

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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.