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Finding the Fourth Proportional to 441.57, 661.98 and 278.89

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Solution

The fourth proportional to 441.57, 661.98 and 278.89 is: 418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.57 : 661.98 = 278.89 : x
  2. Step 2: Convert to fraction form
    441.57/661.98 = 278.89/x
  3. Step 3: Cross multiply
    441.57x = 661.98 × 278.89
  4. Step 4: Simplify right side
    441.57x = 184,619.60
  5. Step 5: Solve for x
    x = 184,619.60/441.57
  6. Step 6: Final answer
    x = 418.10

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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.