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Finding the Fourth Proportional to 465.08, 641.66 and 278.64

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Solution

The fourth proportional to 465.08, 641.66 and 278.64 is: 384.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.08 : 641.66 = 278.64 : x
  2. Step 2: Convert to fraction form
    465.08/641.66 = 278.64/x
  3. Step 3: Cross multiply
    465.08x = 641.66 × 278.64
  4. Step 4: Simplify right side
    465.08x = 178,790.75
  5. Step 5: Solve for x
    x = 178,790.75/465.08
  6. Step 6: Final answer
    x = 384.43

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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.