Home / 1,615.21-2,229.02-1,261.54

Finding the Fourth Proportional to 1,615.21, 2,229.02 and 1,261.54

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Solution

The fourth proportional to 1,615.21, 2,229.02 and 1,261.54 is: 1,740.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.21 : 2,229.02 = 1,261.54 : x
  2. Step 2: Convert to fraction form
    1,615.21/2,229.02 = 1,261.54/x
  3. Step 3: Cross multiply
    1,615.21x = 2,229.02 × 1,261.54
  4. Step 4: Simplify right side
    1,615.21x = 2,811,999.10
  5. Step 5: Solve for x
    x = 2,811,999.10/1,615.21
  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.