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Finding the Fourth Proportional to 2,091.81, 2,886.81 and 1,252.65

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Solution

The fourth proportional to 2,091.81, 2,886.81 and 1,252.65 is: 1,728.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.81 : 2,886.81 = 1,252.65 : x
  2. Step 2: Convert to fraction form
    2,091.81/2,886.81 = 1,252.65/x
  3. Step 3: Cross multiply
    2,091.81x = 2,886.81 × 1,252.65
  4. Step 4: Simplify right side
    2,091.81x = 3,616,162.55
  5. Step 5: Solve for x
    x = 3,616,162.55/2,091.81
  6. Step 6: Final answer
    x = 1,728.72

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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.