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Finding the Fourth Proportional to 539.40, 744.36 and 326.76

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Solution

The fourth proportional to 539.40, 744.36 and 326.76 is: 450.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.40 : 744.36 = 326.76 : x
  2. Step 2: Convert to fraction form
    539.40/744.36 = 326.76/x
  3. Step 3: Cross multiply
    539.40x = 744.36 × 326.76
  4. Step 4: Simplify right side
    539.40x = 243,227.07
  5. Step 5: Solve for x
    x = 243,227.07/539.40
  6. Step 6: Final answer
    x = 450.92

Related Problems

Find fourth proportional to 269.70, 372.18 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.