Home / 2,160.15-3,239.40-698.91

Finding the Fourth Proportional to 2,160.15, 3,239.40 and 698.91

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Solution

The fourth proportional to 2,160.15, 3,239.40 and 698.91 is: 1,048.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.15 : 3,239.40 = 698.91 : x
  2. Step 2: Convert to fraction form
    2,160.15/3,239.40 = 698.91/x
  3. Step 3: Cross multiply
    2,160.15x = 3,239.40 × 698.91
  4. Step 4: Simplify right side
    2,160.15x = 2,264,039.53
  5. Step 5: Solve for x
    x = 2,264,039.53/2,160.15
  6. Step 6: Final answer
    x = 1,048.10

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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.