Home / 2,815.65-3,885.57-1,767.51

Finding the Fourth Proportional to 2,815.65, 3,885.57 and 1,767.51

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Solution

The fourth proportional to 2,815.65, 3,885.57 and 1,767.51 is: 2,439.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.65 : 3,885.57 = 1,767.51 : x
  2. Step 2: Convert to fraction form
    2,815.65/3,885.57 = 1,767.51/x
  3. Step 3: Cross multiply
    2,815.65x = 3,885.57 × 1,767.51
  4. Step 4: Simplify right side
    2,815.65x = 6,867,783.83
  5. Step 5: Solve for x
    x = 6,867,783.83/2,815.65
  6. Step 6: Final answer
    x = 2,439.15

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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.