Home / 1,540.90-2,126.60-877.87

Finding the Fourth Proportional to 1,540.90, 2,126.60 and 877.87

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Solution

The fourth proportional to 1,540.90, 2,126.60 and 877.87 is: 1,211.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.90 : 2,126.60 = 877.87 : x
  2. Step 2: Convert to fraction form
    1,540.90/2,126.60 = 877.87/x
  3. Step 3: Cross multiply
    1,540.90x = 2,126.60 × 877.87
  4. Step 4: Simplify right side
    1,540.90x = 1,866,878.34
  5. Step 5: Solve for x
    x = 1,866,878.34/1,540.90
  6. Step 6: Final answer
    x = 1,211.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.