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Finding the Fourth Proportional to 376.78, 519.78 and 245.74

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Solution

The fourth proportional to 376.78, 519.78 and 245.74 is: 339.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.78 : 519.78 = 245.74 : x
  2. Step 2: Convert to fraction form
    376.78/519.78 = 245.74/x
  3. Step 3: Cross multiply
    376.78x = 519.78 × 245.74
  4. Step 4: Simplify right side
    376.78x = 127,730.74
  5. Step 5: Solve for x
    x = 127,730.74/376.78
  6. Step 6: Final answer
    x = 339.01

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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.