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Finding the Fourth Proportional to 454.96, 627.90 and 307.60

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Solution

The fourth proportional to 454.96, 627.90 and 307.60 is: 424.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.96 : 627.90 = 307.60 : x
  2. Step 2: Convert to fraction form
    454.96/627.90 = 307.60/x
  3. Step 3: Cross multiply
    454.96x = 627.90 × 307.60
  4. Step 4: Simplify right side
    454.96x = 193,142.04
  5. Step 5: Solve for x
    x = 193,142.04/454.96
  6. Step 6: Final answer
    x = 424.53

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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.