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Finding the Fourth Proportional to 621.54, 855.77 and 590.76

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Solution

The fourth proportional to 621.54, 855.77 and 590.76 is: 813.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.54 : 855.77 = 590.76 : x
  2. Step 2: Convert to fraction form
    621.54/855.77 = 590.76/x
  3. Step 3: Cross multiply
    621.54x = 855.77 × 590.76
  4. Step 4: Simplify right side
    621.54x = 505,551.73
  5. Step 5: Solve for x
    x = 505,551.73/621.54
  6. Step 6: Final answer
    x = 813.39

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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.