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Finding the Fourth Proportional to 374.08, 516.74 and 281.53

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Solution

The fourth proportional to 374.08, 516.74 and 281.53 is: 388.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.08 : 516.74 = 281.53 : x
  2. Step 2: Convert to fraction form
    374.08/516.74 = 281.53/x
  3. Step 3: Cross multiply
    374.08x = 516.74 × 281.53
  4. Step 4: Simplify right side
    374.08x = 145,477.81
  5. Step 5: Solve for x
    x = 145,477.81/374.08
  6. Step 6: Final answer
    x = 388.89

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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.