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Finding the Fourth Proportional to 1,236.15, 1,854.19 and 505.55

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Solution

The fourth proportional to 1,236.15, 1,854.19 and 505.55 is: 758.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.15 : 1,854.19 = 505.55 : x
  2. Step 2: Convert to fraction form
    1,236.15/1,854.19 = 505.55/x
  3. Step 3: Cross multiply
    1,236.15x = 1,854.19 × 505.55
  4. Step 4: Simplify right side
    1,236.15x = 937,385.75
  5. Step 5: Solve for x
    x = 937,385.75/1,236.15
  6. Step 6: Final answer
    x = 758.31

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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.