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Finding the Fourth Proportional to 2,187.81, 3,275.55 and 2,015.55

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Solution

The fourth proportional to 2,187.81, 3,275.55 and 2,015.55 is: 3,017.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.81 : 3,275.55 = 2,015.55 : x
  2. Step 2: Convert to fraction form
    2,187.81/3,275.55 = 2,015.55/x
  3. Step 3: Cross multiply
    2,187.81x = 3,275.55 × 2,015.55
  4. Step 4: Simplify right side
    2,187.81x = 6,602,034.80
  5. Step 5: Solve for x
    x = 6,602,034.80/2,187.81
  6. Step 6: Final answer
    x = 3,017.65

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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.