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Finding the Fourth Proportional to 604.45, 908.70 and 515.35

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Solution

The fourth proportional to 604.45, 908.70 and 515.35 is: 774.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.45 : 908.70 = 515.35 : x
  2. Step 2: Convert to fraction form
    604.45/908.70 = 515.35/x
  3. Step 3: Cross multiply
    604.45x = 908.70 × 515.35
  4. Step 4: Simplify right side
    604.45x = 468,298.55
  5. Step 5: Solve for x
    x = 468,298.55/604.45
  6. Step 6: Final answer
    x = 774.75

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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.