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Finding the Fourth Proportional to 603.66, 905.51 and 439.63

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Solution

The fourth proportional to 603.66, 905.51 and 439.63 is: 659.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.66 : 905.51 = 439.63 : x
  2. Step 2: Convert to fraction form
    603.66/905.51 = 439.63/x
  3. Step 3: Cross multiply
    603.66x = 905.51 × 439.63
  4. Step 4: Simplify right side
    603.66x = 398,089.36
  5. Step 5: Solve for x
    x = 398,089.36/603.66
  6. Step 6: Final answer
    x = 659.46

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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.