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Finding the Fourth Proportional to 583.70, 805.43 and 321.72

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Solution

The fourth proportional to 583.70, 805.43 and 321.72 is: 443.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.70 : 805.43 = 321.72 : x
  2. Step 2: Convert to fraction form
    583.70/805.43 = 321.72/x
  3. Step 3: Cross multiply
    583.70x = 805.43 × 321.72
  4. Step 4: Simplify right side
    583.70x = 259,121.33
  5. Step 5: Solve for x
    x = 259,121.33/583.70
  6. Step 6: Final answer
    x = 443.93

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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.