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Finding the Fourth Proportional to 501.16, 691.98 and 326.80

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Solution

The fourth proportional to 501.16, 691.98 and 326.80 is: 451.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.16 : 691.98 = 326.80 : x
  2. Step 2: Convert to fraction form
    501.16/691.98 = 326.80/x
  3. Step 3: Cross multiply
    501.16x = 691.98 × 326.80
  4. Step 4: Simplify right side
    501.16x = 226,139.06
  5. Step 5: Solve for x
    x = 226,139.06/501.16
  6. Step 6: Final answer
    x = 451.23

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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.