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Finding the Fourth Proportional to 371.30, 511.85 and 260.43

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Solution

The fourth proportional to 371.30, 511.85 and 260.43 is: 359.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.30 : 511.85 = 260.43 : x
  2. Step 2: Convert to fraction form
    371.30/511.85 = 260.43/x
  3. Step 3: Cross multiply
    371.30x = 511.85 × 260.43
  4. Step 4: Simplify right side
    371.30x = 133,299.79
  5. Step 5: Solve for x
    x = 133,299.79/371.30
  6. Step 6: Final answer
    x = 359.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.