Home / 1,431.34-2,147.61-609.79

Finding the Fourth Proportional to 1,431.34, 2,147.61 and 609.79

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Solution

The fourth proportional to 1,431.34, 2,147.61 and 609.79 is: 914.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.34 : 2,147.61 = 609.79 : x
  2. Step 2: Convert to fraction form
    1,431.34/2,147.61 = 609.79/x
  3. Step 3: Cross multiply
    1,431.34x = 2,147.61 × 609.79
  4. Step 4: Simplify right side
    1,431.34x = 1,309,591.10
  5. Step 5: Solve for x
    x = 1,309,591.10/1,431.34
  6. Step 6: Final answer
    x = 914.94

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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.