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Finding the Fourth Proportional to 384.55, 576.21 and 210.95

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Solution

The fourth proportional to 384.55, 576.21 and 210.95 is: 316.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.55 : 576.21 = 210.95 : x
  2. Step 2: Convert to fraction form
    384.55/576.21 = 210.95/x
  3. Step 3: Cross multiply
    384.55x = 576.21 × 210.95
  4. Step 4: Simplify right side
    384.55x = 121,554.81
  5. Step 5: Solve for x
    x = 121,554.81/384.55
  6. Step 6: Final answer
    x = 316.10

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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.