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Finding the Fourth Proportional to 1,405.00, 2,107.83 and 417.82

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Solution

The fourth proportional to 1,405.00, 2,107.83 and 417.82 is: 626.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.00 : 2,107.83 = 417.82 : x
  2. Step 2: Convert to fraction form
    1,405.00/2,107.83 = 417.82/x
  3. Step 3: Cross multiply
    1,405.00x = 2,107.83 × 417.82
  4. Step 4: Simplify right side
    1,405.00x = 880,691.44
  5. Step 5: Solve for x
    x = 880,691.44/1,405.00
  6. Step 6: Final answer
    x = 626.83

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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.