Home / 1,211.85-1,669.68-1,015.02

Finding the Fourth Proportional to 1,211.85, 1,669.68 and 1,015.02

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Solution

The fourth proportional to 1,211.85, 1,669.68 and 1,015.02 is: 1,398.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.85 : 1,669.68 = 1,015.02 : x
  2. Step 2: Convert to fraction form
    1,211.85/1,669.68 = 1,015.02/x
  3. Step 3: Cross multiply
    1,211.85x = 1,669.68 × 1,015.02
  4. Step 4: Simplify right side
    1,211.85x = 1,694,758.59
  5. Step 5: Solve for x
    x = 1,694,758.59/1,211.85
  6. Step 6: Final answer
    x = 1,398.49

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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.