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Finding the Fourth Proportional to 540.56, 810.70 and 215.75

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Solution

The fourth proportional to 540.56, 810.70 and 215.75 is: 323.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.56 : 810.70 = 215.75 : x
  2. Step 2: Convert to fraction form
    540.56/810.70 = 215.75/x
  3. Step 3: Cross multiply
    540.56x = 810.70 × 215.75
  4. Step 4: Simplify right side
    540.56x = 174,903.93
  5. Step 5: Solve for x
    x = 174,903.93/540.56
  6. Step 6: Final answer
    x = 323.56

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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.