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Finding the Fourth Proportional to 612.99, 919.28 and 352.94

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Solution

The fourth proportional to 612.99, 919.28 and 352.94 is: 529.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.99 : 919.28 = 352.94 : x
  2. Step 2: Convert to fraction form
    612.99/919.28 = 352.94/x
  3. Step 3: Cross multiply
    612.99x = 919.28 × 352.94
  4. Step 4: Simplify right side
    612.99x = 324,446.97
  5. Step 5: Solve for x
    x = 324,446.97/612.99
  6. Step 6: Final answer
    x = 529.29

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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.