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Finding the Fourth Proportional to 1,236.39, 1,851.75 and 802.23

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Solution

The fourth proportional to 1,236.39, 1,851.75 and 802.23 is: 1,201.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.39 : 1,851.75 = 802.23 : x
  2. Step 2: Convert to fraction form
    1,236.39/1,851.75 = 802.23/x
  3. Step 3: Cross multiply
    1,236.39x = 1,851.75 × 802.23
  4. Step 4: Simplify right side
    1,236.39x = 1,485,529.40
  5. Step 5: Solve for x
    x = 1,485,529.40/1,236.39
  6. Step 6: Final answer
    x = 1,201.51

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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.