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Finding the Fourth Proportional to 380.08, 570.24 and 258.16

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Solution

The fourth proportional to 380.08, 570.24 and 258.16 is: 387.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.08 : 570.24 = 258.16 : x
  2. Step 2: Convert to fraction form
    380.08/570.24 = 258.16/x
  3. Step 3: Cross multiply
    380.08x = 570.24 × 258.16
  4. Step 4: Simplify right side
    380.08x = 147,213.16
  5. Step 5: Solve for x
    x = 147,213.16/380.08
  6. Step 6: Final answer
    x = 387.32

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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.