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Finding the Fourth Proportional to 490.79, 737.54 and 259.81

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Solution

The fourth proportional to 490.79, 737.54 and 259.81 is: 390.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.79 : 737.54 = 259.81 : x
  2. Step 2: Convert to fraction form
    490.79/737.54 = 259.81/x
  3. Step 3: Cross multiply
    490.79x = 737.54 × 259.81
  4. Step 4: Simplify right side
    490.79x = 191,618.10
  5. Step 5: Solve for x
    x = 191,618.10/490.79
  6. Step 6: Final answer
    x = 390.43

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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.