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Finding the Fourth Proportional to 3,271.31, 4,905.98 and 931.15

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Solution

The fourth proportional to 3,271.31, 4,905.98 and 931.15 is: 1,396.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,271.31 : 4,905.98 = 931.15 : x
  2. Step 2: Convert to fraction form
    3,271.31/4,905.98 = 931.15/x
  3. Step 3: Cross multiply
    3,271.31x = 4,905.98 × 931.15
  4. Step 4: Simplify right side
    3,271.31x = 4,568,203.28
  5. Step 5: Solve for x
    x = 4,568,203.28/3,271.31
  6. Step 6: Final answer
    x = 1,396.44

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1.5x scale

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.