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Finding the Fourth Proportional to 455.05, 627.96 and 248.05

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Solution

The fourth proportional to 455.05, 627.96 and 248.05 is: 342.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.05 : 627.96 = 248.05 : x
  2. Step 2: Convert to fraction form
    455.05/627.96 = 248.05/x
  3. Step 3: Cross multiply
    455.05x = 627.96 × 248.05
  4. Step 4: Simplify right side
    455.05x = 155,762.34
  5. Step 5: Solve for x
    x = 155,762.34/455.05
  6. Step 6: Final answer
    x = 342.30

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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.