Home / 1,097.20-1,645.41-480.72

Finding the Fourth Proportional to 1,097.20, 1,645.41 and 480.72

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Solution

The fourth proportional to 1,097.20, 1,645.41 and 480.72 is: 720.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.20 : 1,645.41 = 480.72 : x
  2. Step 2: Convert to fraction form
    1,097.20/1,645.41 = 480.72/x
  3. Step 3: Cross multiply
    1,097.20x = 1,645.41 × 480.72
  4. Step 4: Simplify right side
    1,097.20x = 790,981.50
  5. Step 5: Solve for x
    x = 790,981.50/1,097.20
  6. Step 6: Final answer
    x = 720.91

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Double scale
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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.