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Finding the Fourth Proportional to 348.50, 480.73 and 307.15

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Solution

The fourth proportional to 348.50, 480.73 and 307.15 is: 423.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.50 : 480.73 = 307.15 : x
  2. Step 2: Convert to fraction form
    348.50/480.73 = 307.15/x
  3. Step 3: Cross multiply
    348.50x = 480.73 × 307.15
  4. Step 4: Simplify right side
    348.50x = 147,656.22
  5. Step 5: Solve for x
    x = 147,656.22/348.50
  6. Step 6: Final answer
    x = 423.69

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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.