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Finding the Fourth Proportional to 513.64, 770.36 and 188.78

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Solution

The fourth proportional to 513.64, 770.36 and 188.78 is: 283.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.64 : 770.36 = 188.78 : x
  2. Step 2: Convert to fraction form
    513.64/770.36 = 188.78/x
  3. Step 3: Cross multiply
    513.64x = 770.36 × 188.78
  4. Step 4: Simplify right side
    513.64x = 145,429.16
  5. Step 5: Solve for x
    x = 145,429.16/513.64
  6. Step 6: Final answer
    x = 283.13

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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.