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Finding the Fourth Proportional to 2,653.56, 3,649.74 and 2,128.44

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Solution

The fourth proportional to 2,653.56, 3,649.74 and 2,128.44 is: 2,927.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,653.56 : 3,649.74 = 2,128.44 : x
  2. Step 2: Convert to fraction form
    2,653.56/3,649.74 = 2,128.44/x
  3. Step 3: Cross multiply
    2,653.56x = 3,649.74 × 2,128.44
  4. Step 4: Simplify right side
    2,653.56x = 7,768,252.61
  5. Step 5: Solve for x
    x = 7,768,252.61/2,653.56
  6. Step 6: Final answer
    x = 2,927.48

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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.