Home / 1,322.23-1,981.11-800.65

Finding the Fourth Proportional to 1,322.23, 1,981.11 and 800.65

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Solution

The fourth proportional to 1,322.23, 1,981.11 and 800.65 is: 1,199.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.23 : 1,981.11 = 800.65 : x
  2. Step 2: Convert to fraction form
    1,322.23/1,981.11 = 800.65/x
  3. Step 3: Cross multiply
    1,322.23x = 1,981.11 × 800.65
  4. Step 4: Simplify right side
    1,322.23x = 1,586,178.67
  5. Step 5: Solve for x
    x = 1,586,178.67/1,322.23
  6. Step 6: Final answer
    x = 1,199.62

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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.