Home / 1,589.09-2,385.16-664.40

Finding the Fourth Proportional to 1,589.09, 2,385.16 and 664.40

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Solution

The fourth proportional to 1,589.09, 2,385.16 and 664.40 is: 997.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.09 : 2,385.16 = 664.40 : x
  2. Step 2: Convert to fraction form
    1,589.09/2,385.16 = 664.40/x
  3. Step 3: Cross multiply
    1,589.09x = 2,385.16 × 664.40
  4. Step 4: Simplify right side
    1,589.09x = 1,584,700.30
  5. Step 5: Solve for x
    x = 1,584,700.30/1,589.09
  6. Step 6: Final answer
    x = 997.24

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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.