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Finding the Fourth Proportional to 472.20, 708.70 and 228.93

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Solution

The fourth proportional to 472.20, 708.70 and 228.93 is: 343.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.20 : 708.70 = 228.93 : x
  2. Step 2: Convert to fraction form
    472.20/708.70 = 228.93/x
  3. Step 3: Cross multiply
    472.20x = 708.70 × 228.93
  4. Step 4: Simplify right side
    472.20x = 162,242.69
  5. Step 5: Solve for x
    x = 162,242.69/472.20
  6. Step 6: Final answer
    x = 343.59

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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.