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Finding the Fourth Proportional to 1,705.68, 2,558.31 and 609.96

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Solution

The fourth proportional to 1,705.68, 2,558.31 and 609.96 is: 914.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.68 : 2,558.31 = 609.96 : x
  2. Step 2: Convert to fraction form
    1,705.68/2,558.31 = 609.96/x
  3. Step 3: Cross multiply
    1,705.68x = 2,558.31 × 609.96
  4. Step 4: Simplify right side
    1,705.68x = 1,560,466.77
  5. Step 5: Solve for x
    x = 1,560,466.77/1,705.68
  6. Step 6: Final answer
    x = 914.86

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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.