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Finding the Fourth Proportional to 514.55, 771.80 and 185.50

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Solution

The fourth proportional to 514.55, 771.80 and 185.50 is: 278.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.55 : 771.80 = 185.50 : x
  2. Step 2: Convert to fraction form
    514.55/771.80 = 185.50/x
  3. Step 3: Cross multiply
    514.55x = 771.80 × 185.50
  4. Step 4: Simplify right side
    514.55x = 143,167.43
  5. Step 5: Solve for x
    x = 143,167.43/514.55
  6. Step 6: Final answer
    x = 278.24

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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.