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Finding the Fourth Proportional to 456.28, 629.54 and 259.76

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Solution

The fourth proportional to 456.28, 629.54 and 259.76 is: 358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.28 : 629.54 = 259.76 : x
  2. Step 2: Convert to fraction form
    456.28/629.54 = 259.76/x
  3. Step 3: Cross multiply
    456.28x = 629.54 × 259.76
  4. Step 4: Simplify right side
    456.28x = 163,529.31
  5. Step 5: Solve for x
    x = 163,529.31/456.28
  6. Step 6: Final answer
    x = 358.40

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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.