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Finding the Fourth Proportional to 936.76, 1,401.90 and 611.32

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Solution

The fourth proportional to 936.76, 1,401.90 and 611.32 is: 914.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.76 : 1,401.90 = 611.32 : x
  2. Step 2: Convert to fraction form
    936.76/1,401.90 = 611.32/x
  3. Step 3: Cross multiply
    936.76x = 1,401.90 × 611.32
  4. Step 4: Simplify right side
    936.76x = 857,009.51
  5. Step 5: Solve for x
    x = 857,009.51/936.76
  6. Step 6: Final answer
    x = 914.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.