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Finding the Fourth Proportional to 348.25, 521.79 and 256.45

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Solution

The fourth proportional to 348.25, 521.79 and 256.45 is: 384.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.25 : 521.79 = 256.45 : x
  2. Step 2: Convert to fraction form
    348.25/521.79 = 256.45/x
  3. Step 3: Cross multiply
    348.25x = 521.79 × 256.45
  4. Step 4: Simplify right side
    348.25x = 133,813.05
  5. Step 5: Solve for x
    x = 133,813.05/348.25
  6. Step 6: Final answer
    x = 384.24

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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.