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Finding the Fourth Proportional to 319.41, 479.16 and 99.99

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Solution

The fourth proportional to 319.41, 479.16 and 99.99 is: 150.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.41 : 479.16 = 99.99 : x
  2. Step 2: Convert to fraction form
    319.41/479.16 = 99.99/x
  3. Step 3: Cross multiply
    319.41x = 479.16 × 99.99
  4. Step 4: Simplify right side
    319.41x = 47,911.68
  5. Step 5: Solve for x
    x = 47,911.68/319.41
  6. Step 6: Final answer
    x = 150.00

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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.