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Finding the Fourth Proportional to 454.89, 627.21 and 315.14

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Solution

The fourth proportional to 454.89, 627.21 and 315.14 is: 434.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.89 : 627.21 = 315.14 : x
  2. Step 2: Convert to fraction form
    454.89/627.21 = 315.14/x
  3. Step 3: Cross multiply
    454.89x = 627.21 × 315.14
  4. Step 4: Simplify right side
    454.89x = 197,655.82
  5. Step 5: Solve for x
    x = 197,655.82/454.89
  6. Step 6: Final answer
    x = 434.51

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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.