Home / 1,485.40-2,049.88-822.28

Finding the Fourth Proportional to 1,485.40, 2,049.88 and 822.28

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Solution

The fourth proportional to 1,485.40, 2,049.88 and 822.28 is: 1,134.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.40 : 2,049.88 = 822.28 : x
  2. Step 2: Convert to fraction form
    1,485.40/2,049.88 = 822.28/x
  3. Step 3: Cross multiply
    1,485.40x = 2,049.88 × 822.28
  4. Step 4: Simplify right side
    1,485.40x = 1,685,575.33
  5. Step 5: Solve for x
    x = 1,685,575.33/1,485.40
  6. Step 6: Final answer
    x = 1,134.76

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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.