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Finding the Fourth Proportional to 313.98, 433.46 and 243.89

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Solution

The fourth proportional to 313.98, 433.46 and 243.89 is: 336.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.98 : 433.46 = 243.89 : x
  2. Step 2: Convert to fraction form
    313.98/433.46 = 243.89/x
  3. Step 3: Cross multiply
    313.98x = 433.46 × 243.89
  4. Step 4: Simplify right side
    313.98x = 105,714.39
  5. Step 5: Solve for x
    x = 105,714.39/313.98
  6. Step 6: Final answer
    x = 336.69

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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.