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Finding the Fourth Proportional to 380.85, 526.08 and 291.79

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Solution

The fourth proportional to 380.85, 526.08 and 291.79 is: 403.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.85 : 526.08 = 291.79 : x
  2. Step 2: Convert to fraction form
    380.85/526.08 = 291.79/x
  3. Step 3: Cross multiply
    380.85x = 526.08 × 291.79
  4. Step 4: Simplify right side
    380.85x = 153,504.88
  5. Step 5: Solve for x
    x = 153,504.88/380.85
  6. Step 6: Final answer
    x = 403.06

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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.