Home / 3,431.34-5,146.20-1,485

Finding the Fourth Proportional to 3,431.34, 5,146.20 and 1,485

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Solution

The fourth proportional to 3,431.34, 5,146.20 and 1,485 is: 2,227.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.34 : 5,146.20 = 1,485 : x
  2. Step 2: Convert to fraction form
    3,431.34/5,146.20 = 1,485/x
  3. Step 3: Cross multiply
    3,431.34x = 5,146.20 × 1,485
  4. Step 4: Simplify right side
    3,431.34x = 7,642,107
  5. Step 5: Solve for x
    x = 7,642,107/3,431.34
  6. Step 6: Final answer
    x = 2,227.15

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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.