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Finding the Fourth Proportional to 2,103.84, 3,155.01 and 622.66

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Solution

The fourth proportional to 2,103.84, 3,155.01 and 622.66 is: 933.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.84 : 3,155.01 = 622.66 : x
  2. Step 2: Convert to fraction form
    2,103.84/3,155.01 = 622.66/x
  3. Step 3: Cross multiply
    2,103.84x = 3,155.01 × 622.66
  4. Step 4: Simplify right side
    2,103.84x = 1,964,498.53
  5. Step 5: Solve for x
    x = 1,964,498.53/2,103.84
  6. Step 6: Final answer
    x = 933.77

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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.