Home / 2,076.02-3,113.87-688.90

Finding the Fourth Proportional to 2,076.02, 3,113.87 and 688.90

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Solution

The fourth proportional to 2,076.02, 3,113.87 and 688.90 is: 1,033.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,076.02 : 3,113.87 = 688.90 : x
  2. Step 2: Convert to fraction form
    2,076.02/3,113.87 = 688.90/x
  3. Step 3: Cross multiply
    2,076.02x = 3,113.87 × 688.90
  4. Step 4: Simplify right side
    2,076.02x = 2,145,141.60
  5. Step 5: Solve for x
    x = 2,145,141.60/2,076.02
  6. Step 6: Final answer
    x = 1,033.30

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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.