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Finding the Fourth Proportional to 326.58, 493.57 and 320.91

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Solution

The fourth proportional to 326.58, 493.57 and 320.91 is: 485.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.58 : 493.57 = 320.91 : x
  2. Step 2: Convert to fraction form
    326.58/493.57 = 320.91/x
  3. Step 3: Cross multiply
    326.58x = 493.57 × 320.91
  4. Step 4: Simplify right side
    326.58x = 158,387.48
  5. Step 5: Solve for x
    x = 158,387.48/326.58
  6. Step 6: Final answer
    x = 485.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.