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Finding the Fourth Proportional to 373.12, 515.09 and 255.70

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Solution

The fourth proportional to 373.12, 515.09 and 255.70 is: 352.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.12 : 515.09 = 255.70 : x
  2. Step 2: Convert to fraction form
    373.12/515.09 = 255.70/x
  3. Step 3: Cross multiply
    373.12x = 515.09 × 255.70
  4. Step 4: Simplify right side
    373.12x = 131,708.51
  5. Step 5: Solve for x
    x = 131,708.51/373.12
  6. Step 6: Final answer
    x = 352.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.