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Finding the Fourth Proportional to 472.28, 651.81 and 355.64

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Solution

The fourth proportional to 472.28, 651.81 and 355.64 is: 490.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.28 : 651.81 = 355.64 : x
  2. Step 2: Convert to fraction form
    472.28/651.81 = 355.64/x
  3. Step 3: Cross multiply
    472.28x = 651.81 × 355.64
  4. Step 4: Simplify right side
    472.28x = 231,809.71
  5. Step 5: Solve for x
    x = 231,809.71/472.28
  6. Step 6: Final answer
    x = 490.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.