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Finding the Fourth Proportional to 380.28, 570 and 277

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Solution

The fourth proportional to 380.28, 570 and 277 is: 415.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.28 : 570 = 277 : x
  2. Step 2: Convert to fraction form
    380.28/570 = 277/x
  3. Step 3: Cross multiply
    380.28x = 570 × 277
  4. Step 4: Simplify right side
    380.28x = 157,890
  5. Step 5: Solve for x
    x = 157,890/380.28
  6. Step 6: Final answer
    x = 415.19

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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.