Home / 1,720.45-2,373.31-1,089.86

Finding the Fourth Proportional to 1,720.45, 2,373.31 and 1,089.86

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Solution

The fourth proportional to 1,720.45, 2,373.31 and 1,089.86 is: 1,503.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.45 : 2,373.31 = 1,089.86 : x
  2. Step 2: Convert to fraction form
    1,720.45/2,373.31 = 1,089.86/x
  3. Step 3: Cross multiply
    1,720.45x = 2,373.31 × 1,089.86
  4. Step 4: Simplify right side
    1,720.45x = 2,586,578.85
  5. Step 5: Solve for x
    x = 2,586,578.85/1,720.45
  6. Step 6: Final answer
    x = 1,503.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.