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Finding the Fourth Proportional to 406.95, 609.71 and 278.07

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Solution

The fourth proportional to 406.95, 609.71 and 278.07 is: 416.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.95 : 609.71 = 278.07 : x
  2. Step 2: Convert to fraction form
    406.95/609.71 = 278.07/x
  3. Step 3: Cross multiply
    406.95x = 609.71 × 278.07
  4. Step 4: Simplify right side
    406.95x = 169,540.67
  5. Step 5: Solve for x
    x = 169,540.67/406.95
  6. Step 6: Final answer
    x = 416.61

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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.