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Finding the Fourth Proportional to 862.39, 1,189.59 and 626.06

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Solution

The fourth proportional to 862.39, 1,189.59 and 626.06 is: 863.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.39 : 1,189.59 = 626.06 : x
  2. Step 2: Convert to fraction form
    862.39/1,189.59 = 626.06/x
  3. Step 3: Cross multiply
    862.39x = 1,189.59 × 626.06
  4. Step 4: Simplify right side
    862.39x = 744,754.72
  5. Step 5: Solve for x
    x = 744,754.72/862.39
  6. Step 6: Final answer
    x = 863.59

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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.