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Finding the Fourth Proportional to 384.51, 576.18 and 281.64

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Solution

The fourth proportional to 384.51, 576.18 and 281.64 is: 422.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.51 : 576.18 = 281.64 : x
  2. Step 2: Convert to fraction form
    384.51/576.18 = 281.64/x
  3. Step 3: Cross multiply
    384.51x = 576.18 × 281.64
  4. Step 4: Simplify right side
    384.51x = 162,275.34
  5. Step 5: Solve for x
    x = 162,275.34/384.51
  6. Step 6: Final answer
    x = 422.03

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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.