Home / 1,215.11-1,818.21-1,020.71

Finding the Fourth Proportional to 1,215.11, 1,818.21 and 1,020.71

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Solution

The fourth proportional to 1,215.11, 1,818.21 and 1,020.71 is: 1,527.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.11 : 1,818.21 = 1,020.71 : x
  2. Step 2: Convert to fraction form
    1,215.11/1,818.21 = 1,020.71/x
  3. Step 3: Cross multiply
    1,215.11x = 1,818.21 × 1,020.71
  4. Step 4: Simplify right side
    1,215.11x = 1,855,865.13
  5. Step 5: Solve for x
    x = 1,855,865.13/1,215.11
  6. Step 6: Final answer
    x = 1,527.32

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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.