Home / 1,239.02-1,868.37-1,222.55

Finding the Fourth Proportional to 1,239.02, 1,868.37 and 1,222.55

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Solution

The fourth proportional to 1,239.02, 1,868.37 and 1,222.55 is: 1,843.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.02 : 1,868.37 = 1,222.55 : x
  2. Step 2: Convert to fraction form
    1,239.02/1,868.37 = 1,222.55/x
  3. Step 3: Cross multiply
    1,239.02x = 1,868.37 × 1,222.55
  4. Step 4: Simplify right side
    1,239.02x = 2,284,175.74
  5. Step 5: Solve for x
    x = 2,284,175.74/1,239.02
  6. Step 6: Final answer
    x = 1,843.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.