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Finding the Fourth Proportional to 406.70, 561.39 and 266.84

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Solution

The fourth proportional to 406.70, 561.39 and 266.84 is: 368.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.70 : 561.39 = 266.84 : x
  2. Step 2: Convert to fraction form
    406.70/561.39 = 266.84/x
  3. Step 3: Cross multiply
    406.70x = 561.39 × 266.84
  4. Step 4: Simplify right side
    406.70x = 149,802.95
  5. Step 5: Solve for x
    x = 149,802.95/406.70
  6. Step 6: Final answer
    x = 368.34

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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.