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Finding the Fourth Proportional to 540.60, 810.69 and 211.49

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Solution

The fourth proportional to 540.60, 810.69 and 211.49 is: 317.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.60 : 810.69 = 211.49 : x
  2. Step 2: Convert to fraction form
    540.60/810.69 = 211.49/x
  3. Step 3: Cross multiply
    540.60x = 810.69 × 211.49
  4. Step 4: Simplify right side
    540.60x = 171,452.83
  5. Step 5: Solve for x
    x = 171,452.83/540.60
  6. Step 6: Final answer
    x = 317.15

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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.