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Finding the Fourth Proportional to 1,236.10, 1,854.18 and 505.16

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Solution

The fourth proportional to 1,236.10, 1,854.18 and 505.16 is: 757.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.10 : 1,854.18 = 505.16 : x
  2. Step 2: Convert to fraction form
    1,236.10/1,854.18 = 505.16/x
  3. Step 3: Cross multiply
    1,236.10x = 1,854.18 × 505.16
  4. Step 4: Simplify right side
    1,236.10x = 936,662.20
  5. Step 5: Solve for x
    x = 936,662.20/1,236.10
  6. Step 6: Final answer
    x = 757.76

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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.