Home / 2,318.46-3,478.99-931.90

Finding the Fourth Proportional to 2,318.46, 3,478.99 and 931.90

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Solution

The fourth proportional to 2,318.46, 3,478.99 and 931.90 is: 1,398.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.46 : 3,478.99 = 931.90 : x
  2. Step 2: Convert to fraction form
    2,318.46/3,478.99 = 931.90/x
  3. Step 3: Cross multiply
    2,318.46x = 3,478.99 × 931.90
  4. Step 4: Simplify right side
    2,318.46x = 3,242,070.78
  5. Step 5: Solve for x
    x = 3,242,070.78/2,318.46
  6. Step 6: Final answer
    x = 1,398.37

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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.