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Finding the Fourth Proportional to 1,080.54, 1,490.99 and 608.42

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Solution

The fourth proportional to 1,080.54, 1,490.99 and 608.42 is: 839.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.54 : 1,490.99 = 608.42 : x
  2. Step 2: Convert to fraction form
    1,080.54/1,490.99 = 608.42/x
  3. Step 3: Cross multiply
    1,080.54x = 1,490.99 × 608.42
  4. Step 4: Simplify right side
    1,080.54x = 907,142.20
  5. Step 5: Solve for x
    x = 907,142.20/1,080.54
  6. Step 6: Final answer
    x = 839.53

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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.