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Finding the Fourth Proportional to 1,100.81, 1,519.11 and 603.45

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Solution

The fourth proportional to 1,100.81, 1,519.11 and 603.45 is: 832.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.81 : 1,519.11 = 603.45 : x
  2. Step 2: Convert to fraction form
    1,100.81/1,519.11 = 603.45/x
  3. Step 3: Cross multiply
    1,100.81x = 1,519.11 × 603.45
  4. Step 4: Simplify right side
    1,100.81x = 916,706.93
  5. Step 5: Solve for x
    x = 916,706.93/1,100.81
  6. Step 6: Final answer
    x = 832.75

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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.