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Finding the Fourth Proportional to 540.54, 810.10 and 215.53

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Solution

The fourth proportional to 540.54, 810.10 and 215.53 is: 323.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.54 : 810.10 = 215.53 : x
  2. Step 2: Convert to fraction form
    540.54/810.10 = 215.53/x
  3. Step 3: Cross multiply
    540.54x = 810.10 × 215.53
  4. Step 4: Simplify right side
    540.54x = 174,599.10
  5. Step 5: Solve for x
    x = 174,599.10/540.54
  6. Step 6: Final answer
    x = 323.01

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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.