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Finding the Fourth Proportional to 374.84, 516.14 and 321.98

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Solution

The fourth proportional to 374.84, 516.14 and 321.98 is: 443.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.84 : 516.14 = 321.98 : x
  2. Step 2: Convert to fraction form
    374.84/516.14 = 321.98/x
  3. Step 3: Cross multiply
    374.84x = 516.14 × 321.98
  4. Step 4: Simplify right side
    374.84x = 166,186.76
  5. Step 5: Solve for x
    x = 166,186.76/374.84
  6. Step 6: Final answer
    x = 443.35

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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.