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Finding the Fourth Proportional to 384.89, 531.15 and 235.47

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Solution

The fourth proportional to 384.89, 531.15 and 235.47 is: 324.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.89 : 531.15 = 235.47 : x
  2. Step 2: Convert to fraction form
    384.89/531.15 = 235.47/x
  3. Step 3: Cross multiply
    384.89x = 531.15 × 235.47
  4. Step 4: Simplify right side
    384.89x = 125,069.89
  5. Step 5: Solve for x
    x = 125,069.89/384.89
  6. Step 6: Final answer
    x = 324.95

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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.