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Finding the Fourth Proportional to 384.75, 530.80 and 235.38

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Solution

The fourth proportional to 384.75, 530.80 and 235.38 is: 324.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.75 : 530.80 = 235.38 : x
  2. Step 2: Convert to fraction form
    384.75/530.80 = 235.38/x
  3. Step 3: Cross multiply
    384.75x = 530.80 × 235.38
  4. Step 4: Simplify right side
    384.75x = 124,940.94
  5. Step 5: Solve for x
    x = 124,940.94/384.75
  6. Step 6: Final answer
    x = 324.73

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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.