Home / 3,131.17-4,696.35-939.31

Finding the Fourth Proportional to 3,131.17, 4,696.35 and 939.31

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Solution

The fourth proportional to 3,131.17, 4,696.35 and 939.31 is: 1,408.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.17 : 4,696.35 = 939.31 : x
  2. Step 2: Convert to fraction form
    3,131.17/4,696.35 = 939.31/x
  3. Step 3: Cross multiply
    3,131.17x = 4,696.35 × 939.31
  4. Step 4: Simplify right side
    3,131.17x = 4,411,328.52
  5. Step 5: Solve for x
    x = 4,411,328.52/3,131.17
  6. Step 6: Final answer
    x = 1,408.84

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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.