Home / 1,431.35-2,147.84-609.54

Finding the Fourth Proportional to 1,431.35, 2,147.84 and 609.54

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Solution

The fourth proportional to 1,431.35, 2,147.84 and 609.54 is: 914.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.35 : 2,147.84 = 609.54 : x
  2. Step 2: Convert to fraction form
    1,431.35/2,147.84 = 609.54/x
  3. Step 3: Cross multiply
    1,431.35x = 2,147.84 × 609.54
  4. Step 4: Simplify right side
    1,431.35x = 1,309,193.63
  5. Step 5: Solve for x
    x = 1,309,193.63/1,431.35
  6. Step 6: Final answer
    x = 914.65

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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.