Home / 2,889.28-3,987.21-1,562.99

Finding the Fourth Proportional to 2,889.28, 3,987.21 and 1,562.99

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Solution

The fourth proportional to 2,889.28, 3,987.21 and 1,562.99 is: 2,156.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.28 : 3,987.21 = 1,562.99 : x
  2. Step 2: Convert to fraction form
    2,889.28/3,987.21 = 1,562.99/x
  3. Step 3: Cross multiply
    2,889.28x = 3,987.21 × 1,562.99
  4. Step 4: Simplify right side
    2,889.28x = 6,231,969.36
  5. Step 5: Solve for x
    x = 6,231,969.36/2,889.28
  6. Step 6: Final answer
    x = 2,156.93

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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.