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Finding the Fourth Proportional to 603.79, 906.53 and 399.67

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Solution

The fourth proportional to 603.79, 906.53 and 399.67 is: 600.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.79 : 906.53 = 399.67 : x
  2. Step 2: Convert to fraction form
    603.79/906.53 = 399.67/x
  3. Step 3: Cross multiply
    603.79x = 906.53 × 399.67
  4. Step 4: Simplify right side
    603.79x = 362,308.58
  5. Step 5: Solve for x
    x = 362,308.58/603.79
  6. Step 6: Final answer
    x = 600.06

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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.