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Finding the Fourth Proportional to 343.75, 515.17 and 307.15

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Solution

The fourth proportional to 343.75, 515.17 and 307.15 is: 460.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.75 : 515.17 = 307.15 : x
  2. Step 2: Convert to fraction form
    343.75/515.17 = 307.15/x
  3. Step 3: Cross multiply
    343.75x = 515.17 × 307.15
  4. Step 4: Simplify right side
    343.75x = 158,234.47
  5. Step 5: Solve for x
    x = 158,234.47/343.75
  6. Step 6: Final answer
    x = 460.32

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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.