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Finding the Fourth Proportional to 936.96, 1,292.56 and 626.72

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Solution

The fourth proportional to 936.96, 1,292.56 and 626.72 is: 864.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.96 : 1,292.56 = 626.72 : x
  2. Step 2: Convert to fraction form
    936.96/1,292.56 = 626.72/x
  3. Step 3: Cross multiply
    936.96x = 1,292.56 × 626.72
  4. Step 4: Simplify right side
    936.96x = 810,073.20
  5. Step 5: Solve for x
    x = 810,073.20/936.96
  6. Step 6: Final answer
    x = 864.58

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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.