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Finding the Fourth Proportional to 1,173.03, 1,618.39 and 724.42

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Solution

The fourth proportional to 1,173.03, 1,618.39 and 724.42 is: 999.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.03 : 1,618.39 = 724.42 : x
  2. Step 2: Convert to fraction form
    1,173.03/1,618.39 = 724.42/x
  3. Step 3: Cross multiply
    1,173.03x = 1,618.39 × 724.42
  4. Step 4: Simplify right side
    1,173.03x = 1,172,394.08
  5. Step 5: Solve for x
    x = 1,172,394.08/1,173.03
  6. Step 6: Final answer
    x = 999.46

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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.