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Finding the Fourth Proportional to 454.02, 627.12 and 394.89

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Solution

The fourth proportional to 454.02, 627.12 and 394.89 is: 545.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.02 : 627.12 = 394.89 : x
  2. Step 2: Convert to fraction form
    454.02/627.12 = 394.89/x
  3. Step 3: Cross multiply
    454.02x = 627.12 × 394.89
  4. Step 4: Simplify right side
    454.02x = 247,643.42
  5. Step 5: Solve for x
    x = 247,643.42/454.02
  6. Step 6: Final answer
    x = 545.45

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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.