Home / 3,115.79-4,299.72-1,718.54

Finding the Fourth Proportional to 3,115.79, 4,299.72 and 1,718.54

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Solution

The fourth proportional to 3,115.79, 4,299.72 and 1,718.54 is: 2,371.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.79 : 4,299.72 = 1,718.54 : x
  2. Step 2: Convert to fraction form
    3,115.79/4,299.72 = 1,718.54/x
  3. Step 3: Cross multiply
    3,115.79x = 4,299.72 × 1,718.54
  4. Step 4: Simplify right side
    3,115.79x = 7,389,210.72
  5. Step 5: Solve for x
    x = 7,389,210.72/3,115.79
  6. Step 6: Final answer
    x = 2,371.54

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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.