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Finding the Fourth Proportional to 3,874.84, 5,349.18 and 2,639.32

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Solution

The fourth proportional to 3,874.84, 5,349.18 and 2,639.32 is: 3,643.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.84 : 5,349.18 = 2,639.32 : x
  2. Step 2: Convert to fraction form
    3,874.84/5,349.18 = 2,639.32/x
  3. Step 3: Cross multiply
    3,874.84x = 5,349.18 × 2,639.32
  4. Step 4: Simplify right side
    3,874.84x = 14,118,197.76
  5. Step 5: Solve for x
    x = 14,118,197.76/3,874.84
  6. Step 6: Final answer
    x = 3,643.56

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1.5x scale

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.