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Finding the Fourth Proportional to 488.09, 673.56 and 278.26

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Solution

The fourth proportional to 488.09, 673.56 and 278.26 is: 383.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.09 : 673.56 = 278.26 : x
  2. Step 2: Convert to fraction form
    488.09/673.56 = 278.26/x
  3. Step 3: Cross multiply
    488.09x = 673.56 × 278.26
  4. Step 4: Simplify right side
    488.09x = 187,422.87
  5. Step 5: Solve for x
    x = 187,422.87/488.09
  6. Step 6: Final answer
    x = 383.99

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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.