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Finding the Fourth Proportional to 620.06, 851.46 and 554.54

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Solution

The fourth proportional to 620.06, 851.46 and 554.54 is: 761.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.06 : 851.46 = 554.54 : x
  2. Step 2: Convert to fraction form
    620.06/851.46 = 554.54/x
  3. Step 3: Cross multiply
    620.06x = 851.46 × 554.54
  4. Step 4: Simplify right side
    620.06x = 472,165.86
  5. Step 5: Solve for x
    x = 472,165.86/620.06
  6. Step 6: Final answer
    x = 761.48

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.