Home / 1,261.50-1,741.10-1,206.15

Finding the Fourth Proportional to 1,261.50, 1,741.10 and 1,206.15

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Solution

The fourth proportional to 1,261.50, 1,741.10 and 1,206.15 is: 1,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.50 : 1,741.10 = 1,206.15 : x
  2. Step 2: Convert to fraction form
    1,261.50/1,741.10 = 1,206.15/x
  3. Step 3: Cross multiply
    1,261.50x = 1,741.10 × 1,206.15
  4. Step 4: Simplify right side
    1,261.50x = 2,100,021.73
  5. Step 5: Solve for x
    x = 2,100,021.73/1,261.50
  6. Step 6: Final answer
    x = 1,664.70

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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.