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Finding the Fourth Proportional to 6,433.64, 8,878.64 and 3,781.00

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Solution

The fourth proportional to 6,433.64, 8,878.64 and 3,781.00 is: 5,217.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,433.64 : 8,878.64 = 3,781.00 : x
  2. Step 2: Convert to fraction form
    6,433.64/8,878.64 = 3,781.00/x
  3. Step 3: Cross multiply
    6,433.64x = 8,878.64 × 3,781.00
  4. Step 4: Simplify right side
    6,433.64x = 33,570,096.74
  5. Step 5: Solve for x
    x = 33,570,096.74/6,433.64
  6. Step 6: Final answer
    x = 5,217.91

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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.