Home / 2,816.75-3,887.53-1,638.47

Finding the Fourth Proportional to 2,816.75, 3,887.53 and 1,638.47

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Solution

The fourth proportional to 2,816.75, 3,887.53 and 1,638.47 is: 2,261.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.75 : 3,887.53 = 1,638.47 : x
  2. Step 2: Convert to fraction form
    2,816.75/3,887.53 = 1,638.47/x
  3. Step 3: Cross multiply
    2,816.75x = 3,887.53 × 1,638.47
  4. Step 4: Simplify right side
    2,816.75x = 6,369,606.90
  5. Step 5: Solve for x
    x = 6,369,606.90/2,816.75
  6. Step 6: Final answer
    x = 2,261.33

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Half scale
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Double scale
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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.