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Finding the Fourth Proportional to 1,242.40, 1,863.60 and 502.36

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Solution

The fourth proportional to 1,242.40, 1,863.60 and 502.36 is: 753.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.40 : 1,863.60 = 502.36 : x
  2. Step 2: Convert to fraction form
    1,242.40/1,863.60 = 502.36/x
  3. Step 3: Cross multiply
    1,242.40x = 1,863.60 × 502.36
  4. Step 4: Simplify right side
    1,242.40x = 936,198.10
  5. Step 5: Solve for x
    x = 936,198.10/1,242.40
  6. Step 6: Final answer
    x = 753.54

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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.