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Finding the Fourth Proportional to 380.72, 570.12 and 265.52

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Solution

The fourth proportional to 380.72, 570.12 and 265.52 is: 397.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.72 : 570.12 = 265.52 : x
  2. Step 2: Convert to fraction form
    380.72/570.12 = 265.52/x
  3. Step 3: Cross multiply
    380.72x = 570.12 × 265.52
  4. Step 4: Simplify right side
    380.72x = 151,378.26
  5. Step 5: Solve for x
    x = 151,378.26/380.72
  6. Step 6: Final answer
    x = 397.61

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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.