Home / 1,485.11-2,049.29-821.87

Finding the Fourth Proportional to 1,485.11, 2,049.29 and 821.87

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Solution

The fourth proportional to 1,485.11, 2,049.29 and 821.87 is: 1,134.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.11 : 2,049.29 = 821.87 : x
  2. Step 2: Convert to fraction form
    1,485.11/2,049.29 = 821.87/x
  3. Step 3: Cross multiply
    1,485.11x = 2,049.29 × 821.87
  4. Step 4: Simplify right side
    1,485.11x = 1,684,245.86
  5. Step 5: Solve for x
    x = 1,684,245.86/1,485.11
  6. Step 6: Final answer
    x = 1,134.09

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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.