Home / 2,102.31-3,153.36-868.80

Finding the Fourth Proportional to 2,102.31, 3,153.36 and 868.80

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Solution

The fourth proportional to 2,102.31, 3,153.36 and 868.80 is: 1,303.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.31 : 3,153.36 = 868.80 : x
  2. Step 2: Convert to fraction form
    2,102.31/3,153.36 = 868.80/x
  3. Step 3: Cross multiply
    2,102.31x = 3,153.36 × 868.80
  4. Step 4: Simplify right side
    2,102.31x = 2,739,639.17
  5. Step 5: Solve for x
    x = 2,739,639.17/2,102.31
  6. Step 6: Final answer
    x = 1,303.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.