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Finding the Fourth Proportional to 343.60, 513.90 and 307.30

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Solution

The fourth proportional to 343.60, 513.90 and 307.30 is: 459.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.60 : 513.90 = 307.30 : x
  2. Step 2: Convert to fraction form
    343.60/513.90 = 307.30/x
  3. Step 3: Cross multiply
    343.60x = 513.90 × 307.30
  4. Step 4: Simplify right side
    343.60x = 157,921.47
  5. Step 5: Solve for x
    x = 157,921.47/343.60
  6. Step 6: Final answer
    x = 459.61

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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.