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Finding the Fourth Proportional to 939.96, 1,402.01 and 885.77

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Solution

The fourth proportional to 939.96, 1,402.01 and 885.77 is: 1,321.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.96 : 1,402.01 = 885.77 : x
  2. Step 2: Convert to fraction form
    939.96/1,402.01 = 885.77/x
  3. Step 3: Cross multiply
    939.96x = 1,402.01 × 885.77
  4. Step 4: Simplify right side
    939.96x = 1,241,846.96
  5. Step 5: Solve for x
    x = 1,241,846.96/939.96
  6. Step 6: Final answer
    x = 1,321.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.