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Finding the Fourth Proportional to 936.76, 1,292.34 and 739.48

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Solution

The fourth proportional to 936.76, 1,292.34 and 739.48 is: 1,020.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.76 : 1,292.34 = 739.48 : x
  2. Step 2: Convert to fraction form
    936.76/1,292.34 = 739.48/x
  3. Step 3: Cross multiply
    936.76x = 1,292.34 × 739.48
  4. Step 4: Simplify right side
    936.76x = 955,659.58
  5. Step 5: Solve for x
    x = 955,659.58/936.76
  6. Step 6: Final answer
    x = 1,020.18

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1.5x scale

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.