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Finding the Fourth Proportional to 540.36, 810.50 and 215.51

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Solution

The fourth proportional to 540.36, 810.50 and 215.51 is: 323.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.36 : 810.50 = 215.51 : x
  2. Step 2: Convert to fraction form
    540.36/810.50 = 215.51/x
  3. Step 3: Cross multiply
    540.36x = 810.50 × 215.51
  4. Step 4: Simplify right side
    540.36x = 174,665.72
  5. Step 5: Solve for x
    x = 174,665.72/540.36
  6. Step 6: Final answer
    x = 323.24

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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.