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Finding the Fourth Proportional to 291.64, 439.04 and 266.54

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Solution

The fourth proportional to 291.64, 439.04 and 266.54 is: 401.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.64 : 439.04 = 266.54 : x
  2. Step 2: Convert to fraction form
    291.64/439.04 = 266.54/x
  3. Step 3: Cross multiply
    291.64x = 439.04 × 266.54
  4. Step 4: Simplify right side
    291.64x = 117,021.72
  5. Step 5: Solve for x
    x = 117,021.72/291.64
  6. Step 6: Final answer
    x = 401.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.