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Finding the Fourth Proportional to 1,243.06, 1,865.12 and 626.44

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Solution

The fourth proportional to 1,243.06, 1,865.12 and 626.44 is: 939.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.06 : 1,865.12 = 626.44 : x
  2. Step 2: Convert to fraction form
    1,243.06/1,865.12 = 626.44/x
  3. Step 3: Cross multiply
    1,243.06x = 1,865.12 × 626.44
  4. Step 4: Simplify right side
    1,243.06x = 1,168,385.77
  5. Step 5: Solve for x
    x = 1,168,385.77/1,243.06
  6. Step 6: Final answer
    x = 939.93

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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.