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Finding the Fourth Proportional to 513.51, 770.41 and 253.58

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Solution

The fourth proportional to 513.51, 770.41 and 253.58 is: 380.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.51 : 770.41 = 253.58 : x
  2. Step 2: Convert to fraction form
    513.51/770.41 = 253.58/x
  3. Step 3: Cross multiply
    513.51x = 770.41 × 253.58
  4. Step 4: Simplify right side
    513.51x = 195,361.37
  5. Step 5: Solve for x
    x = 195,361.37/513.51
  6. Step 6: Final answer
    x = 380.44

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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.