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Finding the Fourth Proportional to 444.78, 613.70 and 279.00

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Solution

The fourth proportional to 444.78, 613.70 and 279.00 is: 384.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.78 : 613.70 = 279.00 : x
  2. Step 2: Convert to fraction form
    444.78/613.70 = 279.00/x
  3. Step 3: Cross multiply
    444.78x = 613.70 × 279.00
  4. Step 4: Simplify right side
    444.78x = 171,217.84
  5. Step 5: Solve for x
    x = 171,217.84/444.78
  6. Step 6: Final answer
    x = 384.95

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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.