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Finding the Fourth Proportional to 455.81, 629.15 and 259.34

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Solution

The fourth proportional to 455.81, 629.15 and 259.34 is: 357.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.81 : 629.15 = 259.34 : x
  2. Step 2: Convert to fraction form
    455.81/629.15 = 259.34/x
  3. Step 3: Cross multiply
    455.81x = 629.15 × 259.34
  4. Step 4: Simplify right side
    455.81x = 163,159.32
  5. Step 5: Solve for x
    x = 163,159.32/455.81
  6. Step 6: Final answer
    x = 357.96

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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.