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Finding the Fourth Proportional to 406.89, 561.06 and 266.96

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Solution

The fourth proportional to 406.89, 561.06 and 266.96 is: 368.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.89 : 561.06 = 266.96 : x
  2. Step 2: Convert to fraction form
    406.89/561.06 = 266.96/x
  3. Step 3: Cross multiply
    406.89x = 561.06 × 266.96
  4. Step 4: Simplify right side
    406.89x = 149,777.77
  5. Step 5: Solve for x
    x = 149,777.77/406.89
  6. Step 6: Final answer
    x = 368.10

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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.