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Finding the Fourth Proportional to 540.32, 810.80 and 215.65

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Solution

The fourth proportional to 540.32, 810.80 and 215.65 is: 323.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.32 : 810.80 = 215.65 : x
  2. Step 2: Convert to fraction form
    540.32/810.80 = 215.65/x
  3. Step 3: Cross multiply
    540.32x = 810.80 × 215.65
  4. Step 4: Simplify right side
    540.32x = 174,843.89
  5. Step 5: Solve for x
    x = 174,843.89/540.32
  6. Step 6: Final answer
    x = 323.59

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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.