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Finding the Fourth Proportional to 373.85, 515.88 and 208.05

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Solution

The fourth proportional to 373.85, 515.88 and 208.05 is: 287.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.85 : 515.88 = 208.05 : x
  2. Step 2: Convert to fraction form
    373.85/515.88 = 208.05/x
  3. Step 3: Cross multiply
    373.85x = 515.88 × 208.05
  4. Step 4: Simplify right side
    373.85x = 107,328.83
  5. Step 5: Solve for x
    x = 107,328.83/373.85
  6. Step 6: Final answer
    x = 287.09

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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.