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Finding the Fourth Proportional to 1,405.08, 2,107.49 and 625.10

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Solution

The fourth proportional to 1,405.08, 2,107.49 and 625.10 is: 937.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.08 : 2,107.49 = 625.10 : x
  2. Step 2: Convert to fraction form
    1,405.08/2,107.49 = 625.10/x
  3. Step 3: Cross multiply
    1,405.08x = 2,107.49 × 625.10
  4. Step 4: Simplify right side
    1,405.08x = 1,317,378.34
  5. Step 5: Solve for x
    x = 1,317,378.34/1,405.08
  6. Step 6: Final answer
    x = 937.58

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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.