Home / 3,160.70-4,741.17-820.65

Finding the Fourth Proportional to 3,160.70, 4,741.17 and 820.65

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Solution

The fourth proportional to 3,160.70, 4,741.17 and 820.65 is: 1,231.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,160.70 : 4,741.17 = 820.65 : x
  2. Step 2: Convert to fraction form
    3,160.70/4,741.17 = 820.65/x
  3. Step 3: Cross multiply
    3,160.70x = 4,741.17 × 820.65
  4. Step 4: Simplify right side
    3,160.70x = 3,890,841.16
  5. Step 5: Solve for x
    x = 3,890,841.16/3,160.70
  6. Step 6: Final answer
    x = 1,231.01

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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.