Home / 3,186.50-4,780.89-1,431.36

Finding the Fourth Proportional to 3,186.50, 4,780.89 and 1,431.36

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Solution

The fourth proportional to 3,186.50, 4,780.89 and 1,431.36 is: 2,147.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.50 : 4,780.89 = 1,431.36 : x
  2. Step 2: Convert to fraction form
    3,186.50/4,780.89 = 1,431.36/x
  3. Step 3: Cross multiply
    3,186.50x = 4,780.89 × 1,431.36
  4. Step 4: Simplify right side
    3,186.50x = 6,843,174.71
  5. Step 5: Solve for x
    x = 6,843,174.71/3,186.50
  6. Step 6: Final answer
    x = 2,147.56

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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.