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Finding the Fourth Proportional to 345.43, 479.16 and 326.98

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Solution

The fourth proportional to 345.43, 479.16 and 326.98 is: 453.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.43 : 479.16 = 326.98 : x
  2. Step 2: Convert to fraction form
    345.43/479.16 = 326.98/x
  3. Step 3: Cross multiply
    345.43x = 479.16 × 326.98
  4. Step 4: Simplify right side
    345.43x = 156,674.54
  5. Step 5: Solve for x
    x = 156,674.54/345.43
  6. Step 6: Final answer
    x = 453.57

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.