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Finding the Fourth Proportional to 539.95, 810.19 and 215.59

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Solution

The fourth proportional to 539.95, 810.19 and 215.59 is: 323.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.95 : 810.19 = 215.59 : x
  2. Step 2: Convert to fraction form
    539.95/810.19 = 215.59/x
  3. Step 3: Cross multiply
    539.95x = 810.19 × 215.59
  4. Step 4: Simplify right side
    539.95x = 174,664.27
  5. Step 5: Solve for x
    x = 174,664.27/539.95
  6. Step 6: Final answer
    x = 323.49

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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.