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Finding the Fourth Proportional to 936.32, 1,291.96 and 543.32

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Solution

The fourth proportional to 936.32, 1,291.96 and 543.32 is: 749.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.32 : 1,291.96 = 543.32 : x
  2. Step 2: Convert to fraction form
    936.32/1,291.96 = 543.32/x
  3. Step 3: Cross multiply
    936.32x = 1,291.96 × 543.32
  4. Step 4: Simplify right side
    936.32x = 701,947.71
  5. Step 5: Solve for x
    x = 701,947.71/936.32
  6. Step 6: Final answer
    x = 749.69

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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.