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Finding the Fourth Proportional to 1,098.13, 1,515.43 and 600.79

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Solution

The fourth proportional to 1,098.13, 1,515.43 and 600.79 is: 829.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.13 : 1,515.43 = 600.79 : x
  2. Step 2: Convert to fraction form
    1,098.13/1,515.43 = 600.79/x
  3. Step 3: Cross multiply
    1,098.13x = 1,515.43 × 600.79
  4. Step 4: Simplify right side
    1,098.13x = 910,447.35
  5. Step 5: Solve for x
    x = 910,447.35/1,098.13
  6. Step 6: Final answer
    x = 829.09

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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.