Home / 3,211.65-4,429.76-2,015.69

Finding the Fourth Proportional to 3,211.65, 4,429.76 and 2,015.69

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Solution

The fourth proportional to 3,211.65, 4,429.76 and 2,015.69 is: 2,780.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.65 : 4,429.76 = 2,015.69 : x
  2. Step 2: Convert to fraction form
    3,211.65/4,429.76 = 2,015.69/x
  3. Step 3: Cross multiply
    3,211.65x = 4,429.76 × 2,015.69
  4. Step 4: Simplify right side
    3,211.65x = 8,928,990.71
  5. Step 5: Solve for x
    x = 8,928,990.71/3,211.65
  6. Step 6: Final answer
    x = 2,780.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.