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Finding the Fourth Proportional to 540.40, 810.36 and 155.56

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Solution

The fourth proportional to 540.40, 810.36 and 155.56 is: 233.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.40 : 810.36 = 155.56 : x
  2. Step 2: Convert to fraction form
    540.40/810.36 = 155.56/x
  3. Step 3: Cross multiply
    540.40x = 810.36 × 155.56
  4. Step 4: Simplify right side
    540.40x = 126,059.60
  5. Step 5: Solve for x
    x = 126,059.60/540.40
  6. Step 6: Final answer
    x = 233.27

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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.