Home / 1,720.40-2,373.36-1,091.72

Finding the Fourth Proportional to 1,720.40, 2,373.36 and 1,091.72

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Solution

The fourth proportional to 1,720.40, 2,373.36 and 1,091.72 is: 1,506.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.40 : 2,373.36 = 1,091.72 : x
  2. Step 2: Convert to fraction form
    1,720.40/2,373.36 = 1,091.72/x
  3. Step 3: Cross multiply
    1,720.40x = 2,373.36 × 1,091.72
  4. Step 4: Simplify right side
    1,720.40x = 2,591,044.58
  5. Step 5: Solve for x
    x = 2,591,044.58/1,720.40
  6. Step 6: Final answer
    x = 1,506.07

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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.