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Finding the Fourth Proportional to 936.58, 1,292.88 and 656.86

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Solution

The fourth proportional to 936.58, 1,292.88 and 656.86 is: 906.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.58 : 1,292.88 = 656.86 : x
  2. Step 2: Convert to fraction form
    936.58/1,292.88 = 656.86/x
  3. Step 3: Cross multiply
    936.58x = 1,292.88 × 656.86
  4. Step 4: Simplify right side
    936.58x = 849,241.16
  5. Step 5: Solve for x
    x = 849,241.16/936.58
  6. Step 6: Final answer
    x = 906.75

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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.