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Finding the Fourth Proportional to 1,100.79, 1,519.08 and 603.43

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Solution

The fourth proportional to 1,100.79, 1,519.08 and 603.43 is: 832.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.79 : 1,519.08 = 603.43 : x
  2. Step 2: Convert to fraction form
    1,100.79/1,519.08 = 603.43/x
  3. Step 3: Cross multiply
    1,100.79x = 1,519.08 × 603.43
  4. Step 4: Simplify right side
    1,100.79x = 916,658.44
  5. Step 5: Solve for x
    x = 916,658.44/1,100.79
  6. Step 6: Final answer
    x = 832.73

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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.