Home / 3,115.20-4,299.93-1,857.18

Finding the Fourth Proportional to 3,115.20, 4,299.93 and 1,857.18

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Solution

The fourth proportional to 3,115.20, 4,299.93 and 1,857.18 is: 2,563.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.20 : 4,299.93 = 1,857.18 : x
  2. Step 2: Convert to fraction form
    3,115.20/4,299.93 = 1,857.18/x
  3. Step 3: Cross multiply
    3,115.20x = 4,299.93 × 1,857.18
  4. Step 4: Simplify right side
    3,115.20x = 7,985,744.00
  5. Step 5: Solve for x
    x = 7,985,744.00/3,115.20
  6. Step 6: Final answer
    x = 2,563.48

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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.