Home / 3,130.18-4,694.91-821.86

Finding the Fourth Proportional to 3,130.18, 4,694.91 and 821.86

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Solution

The fourth proportional to 3,130.18, 4,694.91 and 821.86 is: 1,232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.18 : 4,694.91 = 821.86 : x
  2. Step 2: Convert to fraction form
    3,130.18/4,694.91 = 821.86/x
  3. Step 3: Cross multiply
    3,130.18x = 4,694.91 × 821.86
  4. Step 4: Simplify right side
    3,130.18x = 3,858,558.73
  5. Step 5: Solve for x
    x = 3,858,558.73/3,130.18
  6. Step 6: Final answer
    x = 1,232.70

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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.