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Finding the Fourth Proportional to 340.84, 512.22 and 256.36

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Solution

The fourth proportional to 340.84, 512.22 and 256.36 is: 385.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.84 : 512.22 = 256.36 : x
  2. Step 2: Convert to fraction form
    340.84/512.22 = 256.36/x
  3. Step 3: Cross multiply
    340.84x = 512.22 × 256.36
  4. Step 4: Simplify right side
    340.84x = 131,312.72
  5. Step 5: Solve for x
    x = 131,312.72/340.84
  6. Step 6: Final answer
    x = 385.26

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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.