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Finding the Fourth Proportional to 349.68, 479.93 and 316.74

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Solution

The fourth proportional to 349.68, 479.93 and 316.74 is: 434.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.68 : 479.93 = 316.74 : x
  2. Step 2: Convert to fraction form
    349.68/479.93 = 316.74/x
  3. Step 3: Cross multiply
    349.68x = 479.93 × 316.74
  4. Step 4: Simplify right side
    349.68x = 152,013.03
  5. Step 5: Solve for x
    x = 152,013.03/349.68
  6. Step 6: Final answer
    x = 434.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.