Home / 3,115.40-4,652.90-2,822.31

Finding the Fourth Proportional to 3,115.40, 4,652.90 and 2,822.31

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Solution

The fourth proportional to 3,115.40, 4,652.90 and 2,822.31 is: 4,215.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.40 : 4,652.90 = 2,822.31 : x
  2. Step 2: Convert to fraction form
    3,115.40/4,652.90 = 2,822.31/x
  3. Step 3: Cross multiply
    3,115.40x = 4,652.90 × 2,822.31
  4. Step 4: Simplify right side
    3,115.40x = 13,131,922.67
  5. Step 5: Solve for x
    x = 13,131,922.67/3,115.40
  6. Step 6: Final answer
    x = 4,215.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.