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Finding the Fourth Proportional to 407.18, 561.36 and 267.05

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Solution

The fourth proportional to 407.18, 561.36 and 267.05 is: 368.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.18 : 561.36 = 267.05 : x
  2. Step 2: Convert to fraction form
    407.18/561.36 = 267.05/x
  3. Step 3: Cross multiply
    407.18x = 561.36 × 267.05
  4. Step 4: Simplify right side
    407.18x = 149,912.59
  5. Step 5: Solve for x
    x = 149,912.59/407.18
  6. Step 6: Final answer
    x = 368.17

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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.