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Finding the Fourth Proportional to 380.64, 570.36 and 277.80

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Solution

The fourth proportional to 380.64, 570.36 and 277.80 is: 416.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.64 : 570.36 = 277.80 : x
  2. Step 2: Convert to fraction form
    380.64/570.36 = 277.80/x
  3. Step 3: Cross multiply
    380.64x = 570.36 × 277.80
  4. Step 4: Simplify right side
    380.64x = 158,446.01
  5. Step 5: Solve for x
    x = 158,446.01/380.64
  6. Step 6: Final answer
    x = 416.26

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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.