Home / 3,123.64-4,685.04-931.96

Finding the Fourth Proportional to 3,123.64, 4,685.04 and 931.96

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Solution

The fourth proportional to 3,123.64, 4,685.04 and 931.96 is: 1,397.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.64 : 4,685.04 = 931.96 : x
  2. Step 2: Convert to fraction form
    3,123.64/4,685.04 = 931.96/x
  3. Step 3: Cross multiply
    3,123.64x = 4,685.04 × 931.96
  4. Step 4: Simplify right side
    3,123.64x = 4,366,269.88
  5. Step 5: Solve for x
    x = 4,366,269.88/3,123.64
  6. Step 6: Final answer
    x = 1,397.81

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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.