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Finding the Fourth Proportional to 319.95, 479.82 and 103.59

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Solution

The fourth proportional to 319.95, 479.82 and 103.59 is: 155.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.95 : 479.82 = 103.59 : x
  2. Step 2: Convert to fraction form
    319.95/479.82 = 103.59/x
  3. Step 3: Cross multiply
    319.95x = 479.82 × 103.59
  4. Step 4: Simplify right side
    319.95x = 49,704.55
  5. Step 5: Solve for x
    x = 49,704.55/319.95
  6. Step 6: Final answer
    x = 155.35

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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.