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Finding the Fourth Proportional to 454.89, 627.75 and 258.40

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Solution

The fourth proportional to 454.89, 627.75 and 258.40 is: 356.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.89 : 627.75 = 258.40 : x
  2. Step 2: Convert to fraction form
    454.89/627.75 = 258.40/x
  3. Step 3: Cross multiply
    454.89x = 627.75 × 258.40
  4. Step 4: Simplify right side
    454.89x = 162,209.62
  5. Step 5: Solve for x
    x = 162,209.62/454.89
  6. Step 6: Final answer
    x = 356.59

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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.