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Finding the Fourth Proportional to 606.21, 908.10 and 515.10

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Solution

The fourth proportional to 606.21, 908.10 and 515.10 is: 771.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.21 : 908.10 = 515.10 : x
  2. Step 2: Convert to fraction form
    606.21/908.10 = 515.10/x
  3. Step 3: Cross multiply
    606.21x = 908.10 × 515.10
  4. Step 4: Simplify right side
    606.21x = 467,762.31
  5. Step 5: Solve for x
    x = 467,762.31/606.21
  6. Step 6: Final answer
    x = 771.62

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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.