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Finding the Fourth Proportional to 347.94, 479.25 and 321.99

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Solution

The fourth proportional to 347.94, 479.25 and 321.99 is: 443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.94 : 479.25 = 321.99 : x
  2. Step 2: Convert to fraction form
    347.94/479.25 = 321.99/x
  3. Step 3: Cross multiply
    347.94x = 479.25 × 321.99
  4. Step 4: Simplify right side
    347.94x = 154,313.71
  5. Step 5: Solve for x
    x = 154,313.71/347.94
  6. Step 6: Final answer
    x = 443.51

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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.