Home / 2,309.50-3,187.11-1,261.56

Finding the Fourth Proportional to 2,309.50, 3,187.11 and 1,261.56

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Solution

The fourth proportional to 2,309.50, 3,187.11 and 1,261.56 is: 1,740.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.50 : 3,187.11 = 1,261.56 : x
  2. Step 2: Convert to fraction form
    2,309.50/3,187.11 = 1,261.56/x
  3. Step 3: Cross multiply
    2,309.50x = 3,187.11 × 1,261.56
  4. Step 4: Simplify right side
    2,309.50x = 4,020,730.49
  5. Step 5: Solve for x
    x = 4,020,730.49/2,309.50
  6. Step 6: Final answer
    x = 1,740.95

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1.5x scale

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.