Home / 1,247.67-1,878.93-1,087.29

Finding the Fourth Proportional to 1,247.67, 1,878.93 and 1,087.29

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Solution

The fourth proportional to 1,247.67, 1,878.93 and 1,087.29 is: 1,637.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.67 : 1,878.93 = 1,087.29 : x
  2. Step 2: Convert to fraction form
    1,247.67/1,878.93 = 1,087.29/x
  3. Step 3: Cross multiply
    1,247.67x = 1,878.93 × 1,087.29
  4. Step 4: Simplify right side
    1,247.67x = 2,042,941.80
  5. Step 5: Solve for x
    x = 2,042,941.80/1,247.67
  6. Step 6: Final answer
    x = 1,637.41

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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.