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Finding the Fourth Proportional to 490.16, 735.81 and 387.51

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Solution

The fourth proportional to 490.16, 735.81 and 387.51 is: 581.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.16 : 735.81 = 387.51 : x
  2. Step 2: Convert to fraction form
    490.16/735.81 = 387.51/x
  3. Step 3: Cross multiply
    490.16x = 735.81 × 387.51
  4. Step 4: Simplify right side
    490.16x = 285,133.73
  5. Step 5: Solve for x
    x = 285,133.73/490.16
  6. Step 6: Final answer
    x = 581.72

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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.