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Finding the Fourth Proportional to 1,081.30, 1,621.74 and 496.12

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Solution

The fourth proportional to 1,081.30, 1,621.74 and 496.12 is: 744.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.30 : 1,621.74 = 496.12 : x
  2. Step 2: Convert to fraction form
    1,081.30/1,621.74 = 496.12/x
  3. Step 3: Cross multiply
    1,081.30x = 1,621.74 × 496.12
  4. Step 4: Simplify right side
    1,081.30x = 804,577.65
  5. Step 5: Solve for x
    x = 804,577.65/1,081.30
  6. Step 6: Final answer
    x = 744.08

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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.