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Finding the Fourth Proportional to 2,889.52, 3,987.52 and 1,563.21

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Solution

The fourth proportional to 2,889.52, 3,987.52 and 1,563.21 is: 2,157.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.52 : 3,987.52 = 1,563.21 : x
  2. Step 2: Convert to fraction form
    2,889.52/3,987.52 = 1,563.21/x
  3. Step 3: Cross multiply
    2,889.52x = 3,987.52 × 1,563.21
  4. Step 4: Simplify right side
    2,889.52x = 6,233,303.39
  5. Step 5: Solve for x
    x = 6,233,303.39/2,889.52
  6. Step 6: Final answer
    x = 2,157.21

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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.