Home / 2,455.15-3,683.34-811.71

Finding the Fourth Proportional to 2,455.15, 3,683.34 and 811.71

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Solution

The fourth proportional to 2,455.15, 3,683.34 and 811.71 is: 1,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.15 : 3,683.34 = 811.71 : x
  2. Step 2: Convert to fraction form
    2,455.15/3,683.34 = 811.71/x
  3. Step 3: Cross multiply
    2,455.15x = 3,683.34 × 811.71
  4. Step 4: Simplify right side
    2,455.15x = 2,989,814.68
  5. Step 5: Solve for x
    x = 2,989,814.68/2,455.15
  6. Step 6: Final answer
    x = 1,217.77

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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.