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Finding the Fourth Proportional to 1,618.72, 2,232.48 and 996.64

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Solution

The fourth proportional to 1,618.72, 2,232.48 and 996.64 is: 1,374.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.72 : 2,232.48 = 996.64 : x
  2. Step 2: Convert to fraction form
    1,618.72/2,232.48 = 996.64/x
  3. Step 3: Cross multiply
    1,618.72x = 2,232.48 × 996.64
  4. Step 4: Simplify right side
    1,618.72x = 2,224,978.87
  5. Step 5: Solve for x
    x = 2,224,978.87/1,618.72
  6. Step 6: Final answer
    x = 1,374.53

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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.