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Finding the Fourth Proportional to 349.40, 523.77 and 319.33

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Solution

The fourth proportional to 349.40, 523.77 and 319.33 is: 478.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.40 : 523.77 = 319.33 : x
  2. Step 2: Convert to fraction form
    349.40/523.77 = 319.33/x
  3. Step 3: Cross multiply
    349.40x = 523.77 × 319.33
  4. Step 4: Simplify right side
    349.40x = 167,254.93
  5. Step 5: Solve for x
    x = 167,254.93/349.40
  6. Step 6: Final answer
    x = 478.69

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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.