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Finding the Fourth Proportional to 2,899.61, 4,339.79 and 2,640.21

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Solution

The fourth proportional to 2,899.61, 4,339.79 and 2,640.21 is: 3,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,899.61 : 4,339.79 = 2,640.21 : x
  2. Step 2: Convert to fraction form
    2,899.61/4,339.79 = 2,640.21/x
  3. Step 3: Cross multiply
    2,899.61x = 4,339.79 × 2,640.21
  4. Step 4: Simplify right side
    2,899.61x = 11,457,976.64
  5. Step 5: Solve for x
    x = 11,457,976.64/2,899.61
  6. Step 6: Final answer
    x = 3,951.55

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1.5x scale

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.