Home / 2,160.02-3,239.20-698.78

Finding the Fourth Proportional to 2,160.02, 3,239.20 and 698.78

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Solution

The fourth proportional to 2,160.02, 3,239.20 and 698.78 is: 1,047.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.02 : 3,239.20 = 698.78 : x
  2. Step 2: Convert to fraction form
    2,160.02/3,239.20 = 698.78/x
  3. Step 3: Cross multiply
    2,160.02x = 3,239.20 × 698.78
  4. Step 4: Simplify right side
    2,160.02x = 2,263,488.18
  5. Step 5: Solve for x
    x = 2,263,488.18/2,160.02
  6. Step 6: Final answer
    x = 1,047.90

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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.