Home / 3,239.36-4,860-1,390.64

Finding the Fourth Proportional to 3,239.36, 4,860 and 1,390.64

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Solution

The fourth proportional to 3,239.36, 4,860 and 1,390.64 is: 2,086.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.36 : 4,860 = 1,390.64 : x
  2. Step 2: Convert to fraction form
    3,239.36/4,860 = 1,390.64/x
  3. Step 3: Cross multiply
    3,239.36x = 4,860 × 1,390.64
  4. Step 4: Simplify right side
    3,239.36x = 6,758,510.40
  5. Step 5: Solve for x
    x = 6,758,510.40/3,239.36
  6. Step 6: Final answer
    x = 2,086.37

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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.