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Finding the Fourth Proportional to 309.53, 463.67 and 255.45

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Solution

The fourth proportional to 309.53, 463.67 and 255.45 is: 382.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.53 : 463.67 = 255.45 : x
  2. Step 2: Convert to fraction form
    309.53/463.67 = 255.45/x
  3. Step 3: Cross multiply
    309.53x = 463.67 × 255.45
  4. Step 4: Simplify right side
    309.53x = 118,443.22
  5. Step 5: Solve for x
    x = 118,443.22/309.53
  6. Step 6: Final answer
    x = 382.66

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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.