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Finding the Fourth Proportional to 483.96, 727.20 and 278.63

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Solution

The fourth proportional to 483.96, 727.20 and 278.63 is: 418.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.96 : 727.20 = 278.63 : x
  2. Step 2: Convert to fraction form
    483.96/727.20 = 278.63/x
  3. Step 3: Cross multiply
    483.96x = 727.20 × 278.63
  4. Step 4: Simplify right side
    483.96x = 202,616.10
  5. Step 5: Solve for x
    x = 202,616.10/483.96
  6. Step 6: Final answer
    x = 418.66

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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.