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Finding the Fourth Proportional to 319.39, 440.70 and 179.51

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Solution

The fourth proportional to 319.39, 440.70 and 179.51 is: 247.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.39 : 440.70 = 179.51 : x
  2. Step 2: Convert to fraction form
    319.39/440.70 = 179.51/x
  3. Step 3: Cross multiply
    319.39x = 440.70 × 179.51
  4. Step 4: Simplify right side
    319.39x = 79,110.06
  5. Step 5: Solve for x
    x = 79,110.06/319.39
  6. Step 6: Final answer
    x = 247.69

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1.5x scale

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.