Home / 1,242.42-1,853.09-1,220.55

Finding the Fourth Proportional to 1,242.42, 1,853.09 and 1,220.55

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Solution

The fourth proportional to 1,242.42, 1,853.09 and 1,220.55 is: 1,820.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.42 : 1,853.09 = 1,220.55 : x
  2. Step 2: Convert to fraction form
    1,242.42/1,853.09 = 1,220.55/x
  3. Step 3: Cross multiply
    1,242.42x = 1,853.09 × 1,220.55
  4. Step 4: Simplify right side
    1,242.42x = 2,261,782.90
  5. Step 5: Solve for x
    x = 2,261,782.90/1,242.42
  6. Step 6: Final answer
    x = 1,820.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.