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Finding the Fourth Proportional to 1,236.47, 1,854.72 and 505.53

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Solution

The fourth proportional to 1,236.47, 1,854.72 and 505.53 is: 758.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.47 : 1,854.72 = 505.53 : x
  2. Step 2: Convert to fraction form
    1,236.47/1,854.72 = 505.53/x
  3. Step 3: Cross multiply
    1,236.47x = 1,854.72 × 505.53
  4. Step 4: Simplify right side
    1,236.47x = 937,616.60
  5. Step 5: Solve for x
    x = 937,616.60/1,236.47
  6. Step 6: Final answer
    x = 758.30

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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.