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Finding the Fourth Proportional to 474.30, 711.39 and 300.45

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Solution

The fourth proportional to 474.30, 711.39 and 300.45 is: 450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.30 : 711.39 = 300.45 : x
  2. Step 2: Convert to fraction form
    474.30/711.39 = 300.45/x
  3. Step 3: Cross multiply
    474.30x = 711.39 × 300.45
  4. Step 4: Simplify right side
    474.30x = 213,737.13
  5. Step 5: Solve for x
    x = 213,737.13/474.30
  6. Step 6: Final answer
    x = 450.64

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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.