Home / 1,439.30-2,157.09-605.42

Finding the Fourth Proportional to 1,439.30, 2,157.09 and 605.42

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Solution

The fourth proportional to 1,439.30, 2,157.09 and 605.42 is: 907.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.30 : 2,157.09 = 605.42 : x
  2. Step 2: Convert to fraction form
    1,439.30/2,157.09 = 605.42/x
  3. Step 3: Cross multiply
    1,439.30x = 2,157.09 × 605.42
  4. Step 4: Simplify right side
    1,439.30x = 1,305,945.43
  5. Step 5: Solve for x
    x = 1,305,945.43/1,439.30
  6. Step 6: Final answer
    x = 907.35

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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.