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Finding the Fourth Proportional to 936.18, 1,292.49 and 625.86

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Solution

The fourth proportional to 936.18, 1,292.49 and 625.86 is: 864.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.18 : 1,292.49 = 625.86 : x
  2. Step 2: Convert to fraction form
    936.18/1,292.49 = 625.86/x
  3. Step 3: Cross multiply
    936.18x = 1,292.49 × 625.86
  4. Step 4: Simplify right side
    936.18x = 808,917.79
  5. Step 5: Solve for x
    x = 808,917.79/936.18
  6. Step 6: Final answer
    x = 864.06

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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.