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Finding the Fourth Proportional to 2,889.48, 3,987.48 and 1,563.18

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Solution

The fourth proportional to 2,889.48, 3,987.48 and 1,563.18 is: 2,157.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.48 : 3,987.48 = 1,563.18 : x
  2. Step 2: Convert to fraction form
    2,889.48/3,987.48 = 1,563.18/x
  3. Step 3: Cross multiply
    2,889.48x = 3,987.48 × 1,563.18
  4. Step 4: Simplify right side
    2,889.48x = 6,233,141.17
  5. Step 5: Solve for x
    x = 6,233,141.17/2,889.48
  6. Step 6: Final answer
    x = 2,157.19

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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.