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Finding the Fourth Proportional to 802.44, 1,201.38 and 620.20

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Solution

The fourth proportional to 802.44, 1,201.38 and 620.20 is: 928.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.44 : 1,201.38 = 620.20 : x
  2. Step 2: Convert to fraction form
    802.44/1,201.38 = 620.20/x
  3. Step 3: Cross multiply
    802.44x = 1,201.38 × 620.20
  4. Step 4: Simplify right side
    802.44x = 745,095.88
  5. Step 5: Solve for x
    x = 745,095.88/802.44
  6. Step 6: Final answer
    x = 928.54

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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.