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Finding the Fourth Proportional to 583.29, 804.95 and 321.30

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Solution

The fourth proportional to 583.29, 804.95 and 321.30 is: 443.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.29 : 804.95 = 321.30 : x
  2. Step 2: Convert to fraction form
    583.29/804.95 = 321.30/x
  3. Step 3: Cross multiply
    583.29x = 804.95 × 321.30
  4. Step 4: Simplify right side
    583.29x = 258,628.83
  5. Step 5: Solve for x
    x = 258,628.83/583.29
  6. Step 6: Final answer
    x = 443.40

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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.