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Finding the Fourth Proportional to 4,878.39, 6,732.12 and 2,640.21

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Solution

The fourth proportional to 4,878.39, 6,732.12 and 2,640.21 is: 3,643.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,878.39 : 6,732.12 = 2,640.21 : x
  2. Step 2: Convert to fraction form
    4,878.39/6,732.12 = 2,640.21/x
  3. Step 3: Cross multiply
    4,878.39x = 6,732.12 × 2,640.21
  4. Step 4: Simplify right side
    4,878.39x = 17,774,227.38
  5. Step 5: Solve for x
    x = 17,774,227.38/4,878.39
  6. Step 6: Final answer
    x = 3,643.46

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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.