Home / 2,931.20-4,046.98-1,813.78

Finding the Fourth Proportional to 2,931.20, 4,046.98 and 1,813.78

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Solution

The fourth proportional to 2,931.20, 4,046.98 and 1,813.78 is: 2,504.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.20 : 4,046.98 = 1,813.78 : x
  2. Step 2: Convert to fraction form
    2,931.20/4,046.98 = 1,813.78/x
  3. Step 3: Cross multiply
    2,931.20x = 4,046.98 × 1,813.78
  4. Step 4: Simplify right side
    2,931.20x = 7,340,311.15
  5. Step 5: Solve for x
    x = 7,340,311.15/2,931.20
  6. Step 6: Final answer
    x = 2,504.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.