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Finding the Fourth Proportional to 342.07, 511.53 and 255.46

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Solution

The fourth proportional to 342.07, 511.53 and 255.46 is: 382.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.07 : 511.53 = 255.46 : x
  2. Step 2: Convert to fraction form
    342.07/511.53 = 255.46/x
  3. Step 3: Cross multiply
    342.07x = 511.53 × 255.46
  4. Step 4: Simplify right side
    342.07x = 130,675.45
  5. Step 5: Solve for x
    x = 130,675.45/342.07
  6. Step 6: Final answer
    x = 382.01

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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.