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Finding the Fourth Proportional to 540.31, 810.93 and 215.91

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Solution

The fourth proportional to 540.31, 810.93 and 215.91 is: 324.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.31 : 810.93 = 215.91 : x
  2. Step 2: Convert to fraction form
    540.31/810.93 = 215.91/x
  3. Step 3: Cross multiply
    540.31x = 810.93 × 215.91
  4. Step 4: Simplify right side
    540.31x = 175,087.90
  5. Step 5: Solve for x
    x = 175,087.90/540.31
  6. Step 6: Final answer
    x = 324.05

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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.