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Finding the Fourth Proportional to 540.45, 811.15 and 335.21

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Solution

The fourth proportional to 540.45, 811.15 and 335.21 is: 503.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.45 : 811.15 = 335.21 : x
  2. Step 2: Convert to fraction form
    540.45/811.15 = 335.21/x
  3. Step 3: Cross multiply
    540.45x = 811.15 × 335.21
  4. Step 4: Simplify right side
    540.45x = 271,900.70
  5. Step 5: Solve for x
    x = 271,900.70/540.45
  6. Step 6: Final answer
    x = 503.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.