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Finding the Fourth Proportional to 513.55, 770.91 and 270.01

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Solution

The fourth proportional to 513.55, 770.91 and 270.01 is: 405.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.55 : 770.91 = 270.01 : x
  2. Step 2: Convert to fraction form
    513.55/770.91 = 270.01/x
  3. Step 3: Cross multiply
    513.55x = 770.91 × 270.01
  4. Step 4: Simplify right side
    513.55x = 208,153.41
  5. Step 5: Solve for x
    x = 208,153.41/513.55
  6. Step 6: Final answer
    x = 405.32

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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.