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Finding the Fourth Proportional to 2,046.64, 3,070.16 and 813.78

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Solution

The fourth proportional to 2,046.64, 3,070.16 and 813.78 is: 1,220.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,046.64 : 3,070.16 = 813.78 : x
  2. Step 2: Convert to fraction form
    2,046.64/3,070.16 = 813.78/x
  3. Step 3: Cross multiply
    2,046.64x = 3,070.16 × 813.78
  4. Step 4: Simplify right side
    2,046.64x = 2,498,422.27
  5. Step 5: Solve for x
    x = 2,498,422.27/2,046.64
  6. Step 6: Final answer
    x = 1,220.74

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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.