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Finding the Fourth Proportional to 406.81, 561.54 and 267.18

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Solution

The fourth proportional to 406.81, 561.54 and 267.18 is: 368.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.81 : 561.54 = 267.18 : x
  2. Step 2: Convert to fraction form
    406.81/561.54 = 267.18/x
  3. Step 3: Cross multiply
    406.81x = 561.54 × 267.18
  4. Step 4: Simplify right side
    406.81x = 150,032.26
  5. Step 5: Solve for x
    x = 150,032.26/406.81
  6. Step 6: Final answer
    x = 368.80

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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.