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Finding the Fourth Proportional to 282.72, 389.52 and 260.76

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Solution

The fourth proportional to 282.72, 389.52 and 260.76 is: 359.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.72 : 389.52 = 260.76 : x
  2. Step 2: Convert to fraction form
    282.72/389.52 = 260.76/x
  3. Step 3: Cross multiply
    282.72x = 389.52 × 260.76
  4. Step 4: Simplify right side
    282.72x = 101,571.24
  5. Step 5: Solve for x
    x = 101,571.24/282.72
  6. Step 6: Final answer
    x = 359.26

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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.