Home / 3,160.20-4,740.30-1,405.20

Finding the Fourth Proportional to 3,160.20, 4,740.30 and 1,405.20

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Solution

The fourth proportional to 3,160.20, 4,740.30 and 1,405.20 is: 2,107.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,160.20 : 4,740.30 = 1,405.20 : x
  2. Step 2: Convert to fraction form
    3,160.20/4,740.30 = 1,405.20/x
  3. Step 3: Cross multiply
    3,160.20x = 4,740.30 × 1,405.20
  4. Step 4: Simplify right side
    3,160.20x = 6,661,069.56
  5. Step 5: Solve for x
    x = 6,661,069.56/3,160.20
  6. Step 6: Final answer
    x = 2,107.80

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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.