Home / 1,405.22-2,108.30-625.75

Finding the Fourth Proportional to 1,405.22, 2,108.30 and 625.75

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Solution

The fourth proportional to 1,405.22, 2,108.30 and 625.75 is: 938.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.22 : 2,108.30 = 625.75 : x
  2. Step 2: Convert to fraction form
    1,405.22/2,108.30 = 625.75/x
  3. Step 3: Cross multiply
    1,405.22x = 2,108.30 × 625.75
  4. Step 4: Simplify right side
    1,405.22x = 1,319,260.33
  5. Step 5: Solve for x
    x = 1,319,260.33/1,405.22
  6. Step 6: Final answer
    x = 938.83

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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.