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Finding the Fourth Proportional to 384.31, 533.07 and 371.20

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Solution

The fourth proportional to 384.31, 533.07 and 371.20 is: 514.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.31 : 533.07 = 371.20 : x
  2. Step 2: Convert to fraction form
    384.31/533.07 = 371.20/x
  3. Step 3: Cross multiply
    384.31x = 533.07 × 371.20
  4. Step 4: Simplify right side
    384.31x = 197,875.58
  5. Step 5: Solve for x
    x = 197,875.58/384.31
  6. Step 6: Final answer
    x = 514.89

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.