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Finding the Fourth Proportional to 380.25, 570.38 and 152.25

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Solution

The fourth proportional to 380.25, 570.38 and 152.25 is: 228.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.25 : 570.38 = 152.25 : x
  2. Step 2: Convert to fraction form
    380.25/570.38 = 152.25/x
  3. Step 3: Cross multiply
    380.25x = 570.38 × 152.25
  4. Step 4: Simplify right side
    380.25x = 86,839.59
  5. Step 5: Solve for x
    x = 86,839.59/380.25
  6. Step 6: Final answer
    x = 228.38

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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.