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Finding the Fourth Proportional to 1,803.68, 2,705.66 and 505.16

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Solution

The fourth proportional to 1,803.68, 2,705.66 and 505.16 is: 757.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.68 : 2,705.66 = 505.16 : x
  2. Step 2: Convert to fraction form
    1,803.68/2,705.66 = 505.16/x
  3. Step 3: Cross multiply
    1,803.68x = 2,705.66 × 505.16
  4. Step 4: Simplify right side
    1,803.68x = 1,366,791.21
  5. Step 5: Solve for x
    x = 1,366,791.21/1,803.68
  6. Step 6: Final answer
    x = 757.78

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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.