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Finding the Fourth Proportional to 1,781.38, 2,671.93 and 626.32

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Solution

The fourth proportional to 1,781.38, 2,671.93 and 626.32 is: 939.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.38 : 2,671.93 = 626.32 : x
  2. Step 2: Convert to fraction form
    1,781.38/2,671.93 = 626.32/x
  3. Step 3: Cross multiply
    1,781.38x = 2,671.93 × 626.32
  4. Step 4: Simplify right side
    1,781.38x = 1,673,477.30
  5. Step 5: Solve for x
    x = 1,673,477.30/1,781.38
  6. Step 6: Final answer
    x = 939.43

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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.