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Finding the Fourth Proportional to 501.36, 691.44 and 326.76

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Solution

The fourth proportional to 501.36, 691.44 and 326.76 is: 450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.36 : 691.44 = 326.76 : x
  2. Step 2: Convert to fraction form
    501.36/691.44 = 326.76/x
  3. Step 3: Cross multiply
    501.36x = 691.44 × 326.76
  4. Step 4: Simplify right side
    501.36x = 225,934.93
  5. Step 5: Solve for x
    x = 225,934.93/501.36
  6. Step 6: Final answer
    x = 450.64

Related Problems

Find fourth proportional to 250.68, 345.72 and 163.38
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1.5x scale

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.