Home / 1,331.10-1,992.69-985.95

Finding the Fourth Proportional to 1,331.10, 1,992.69 and 985.95

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Solution

The fourth proportional to 1,331.10, 1,992.69 and 985.95 is: 1,475.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.10 : 1,992.69 = 985.95 : x
  2. Step 2: Convert to fraction form
    1,331.10/1,992.69 = 985.95/x
  3. Step 3: Cross multiply
    1,331.10x = 1,992.69 × 985.95
  4. Step 4: Simplify right side
    1,331.10x = 1,964,692.71
  5. Step 5: Solve for x
    x = 1,964,692.71/1,331.10
  6. Step 6: Final answer
    x = 1,475.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.