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Finding the Fourth Proportional to 380.09, 570.13 and 357.55

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Solution

The fourth proportional to 380.09, 570.13 and 357.55 is: 536.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.09 : 570.13 = 357.55 : x
  2. Step 2: Convert to fraction form
    380.09/570.13 = 357.55/x
  3. Step 3: Cross multiply
    380.09x = 570.13 × 357.55
  4. Step 4: Simplify right side
    380.09x = 203,847.66
  5. Step 5: Solve for x
    x = 203,847.66/380.09
  6. Step 6: Final answer
    x = 536.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.