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Finding the Fourth Proportional to 621.06, 852.83 and 555.54

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Solution

The fourth proportional to 621.06, 852.83 and 555.54 is: 762.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.06 : 852.83 = 555.54 : x
  2. Step 2: Convert to fraction form
    621.06/852.83 = 555.54/x
  3. Step 3: Cross multiply
    621.06x = 852.83 × 555.54
  4. Step 4: Simplify right side
    621.06x = 473,781.18
  5. Step 5: Solve for x
    x = 473,781.18/621.06
  6. Step 6: Final answer
    x = 762.86

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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.