Home / 1,281.55-1,919.73-1,215.13

Finding the Fourth Proportional to 1,281.55, 1,919.73 and 1,215.13

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Solution

The fourth proportional to 1,281.55, 1,919.73 and 1,215.13 is: 1,820.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.55 : 1,919.73 = 1,215.13 : x
  2. Step 2: Convert to fraction form
    1,281.55/1,919.73 = 1,215.13/x
  3. Step 3: Cross multiply
    1,281.55x = 1,919.73 × 1,215.13
  4. Step 4: Simplify right side
    1,281.55x = 2,332,721.51
  5. Step 5: Solve for x
    x = 2,332,721.51/1,281.55
  6. Step 6: Final answer
    x = 1,820.23

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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.