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Finding the Fourth Proportional to 454.40, 627.11 and 380.59

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Solution

The fourth proportional to 454.40, 627.11 and 380.59 is: 525.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.40 : 627.11 = 380.59 : x
  2. Step 2: Convert to fraction form
    454.40/627.11 = 380.59/x
  3. Step 3: Cross multiply
    454.40x = 627.11 × 380.59
  4. Step 4: Simplify right side
    454.40x = 238,669.89
  5. Step 5: Solve for x
    x = 238,669.89/454.40
  6. Step 6: Final answer
    x = 525.24

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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.