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Finding the Fourth Proportional to 256.30, 359.30 and 256.30

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Solution

The fourth proportional to 256.30, 359.30 and 256.30 is: 359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.30 : 359.30 = 256.30 : x
  2. Step 2: Convert to fraction form
    256.30/359.30 = 256.30/x
  3. Step 3: Cross multiply
    256.30x = 359.30 × 256.30
  4. Step 4: Simplify right side
    256.30x = 92,088.59
  5. Step 5: Solve for x
    x = 92,088.59/256.30
  6. Step 6: Final answer
    x = 359.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.