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Finding the Fourth Proportional to 607.92, 912.08 and 299.80

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Solution

The fourth proportional to 607.92, 912.08 and 299.80 is: 449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.92 : 912.08 = 299.80 : x
  2. Step 2: Convert to fraction form
    607.92/912.08 = 299.80/x
  3. Step 3: Cross multiply
    607.92x = 912.08 × 299.80
  4. Step 4: Simplify right side
    607.92x = 273,441.58
  5. Step 5: Solve for x
    x = 273,441.58/607.92
  6. Step 6: Final answer
    x = 449.80

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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.