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Finding the Fourth Proportional to 540.32, 810.94 and 215.90

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Solution

The fourth proportional to 540.32, 810.94 and 215.90 is: 324.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.32 : 810.94 = 215.90 : x
  2. Step 2: Convert to fraction form
    540.32/810.94 = 215.90/x
  3. Step 3: Cross multiply
    540.32x = 810.94 × 215.90
  4. Step 4: Simplify right side
    540.32x = 175,081.95
  5. Step 5: Solve for x
    x = 175,081.95/540.32
  6. Step 6: Final answer
    x = 324.03

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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.