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Finding the Fourth Proportional to 1,405.50, 2,107.98 and 625.38

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Solution

The fourth proportional to 1,405.50, 2,107.98 and 625.38 is: 937.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.50 : 2,107.98 = 625.38 : x
  2. Step 2: Convert to fraction form
    1,405.50/2,107.98 = 625.38/x
  3. Step 3: Cross multiply
    1,405.50x = 2,107.98 × 625.38
  4. Step 4: Simplify right side
    1,405.50x = 1,318,288.53
  5. Step 5: Solve for x
    x = 1,318,288.53/1,405.50
  6. Step 6: Final answer
    x = 937.95

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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.