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Finding the Fourth Proportional to 514.90, 771.06 and 405.52

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Solution

The fourth proportional to 514.90, 771.06 and 405.52 is: 607.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.90 : 771.06 = 405.52 : x
  2. Step 2: Convert to fraction form
    514.90/771.06 = 405.52/x
  3. Step 3: Cross multiply
    514.90x = 771.06 × 405.52
  4. Step 4: Simplify right side
    514.90x = 312,680.25
  5. Step 5: Solve for x
    x = 312,680.25/514.90
  6. Step 6: Final answer
    x = 607.26

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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.