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Finding the Fourth Proportional to 488.03, 673.38 and 278.15

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Solution

The fourth proportional to 488.03, 673.38 and 278.15 is: 383.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.03 : 673.38 = 278.15 : x
  2. Step 2: Convert to fraction form
    488.03/673.38 = 278.15/x
  3. Step 3: Cross multiply
    488.03x = 673.38 × 278.15
  4. Step 4: Simplify right side
    488.03x = 187,301.07
  5. Step 5: Solve for x
    x = 187,301.07/488.03
  6. Step 6: Final answer
    x = 383.79

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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.