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Finding the Fourth Proportional to 1,137.22, 1,705.26 and 406.68

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Solution

The fourth proportional to 1,137.22, 1,705.26 and 406.68 is: 609.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.22 : 1,705.26 = 406.68 : x
  2. Step 2: Convert to fraction form
    1,137.22/1,705.26 = 406.68/x
  3. Step 3: Cross multiply
    1,137.22x = 1,705.26 × 406.68
  4. Step 4: Simplify right side
    1,137.22x = 693,495.14
  5. Step 5: Solve for x
    x = 693,495.14/1,137.22
  6. Step 6: Final answer
    x = 609.82

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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.