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Finding the Fourth Proportional to 371.45, 557.72 and 256.07

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Solution

The fourth proportional to 371.45, 557.72 and 256.07 is: 384.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.45 : 557.72 = 256.07 : x
  2. Step 2: Convert to fraction form
    371.45/557.72 = 256.07/x
  3. Step 3: Cross multiply
    371.45x = 557.72 × 256.07
  4. Step 4: Simplify right side
    371.45x = 142,815.36
  5. Step 5: Solve for x
    x = 142,815.36/371.45
  6. Step 6: Final answer
    x = 384.48

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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.