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Finding the Fourth Proportional to 455.41, 628.55 and 258.89

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Solution

The fourth proportional to 455.41, 628.55 and 258.89 is: 357.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.41 : 628.55 = 258.89 : x
  2. Step 2: Convert to fraction form
    455.41/628.55 = 258.89/x
  3. Step 3: Cross multiply
    455.41x = 628.55 × 258.89
  4. Step 4: Simplify right side
    455.41x = 162,724.34
  5. Step 5: Solve for x
    x = 162,724.34/455.41
  6. Step 6: Final answer
    x = 357.31

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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.