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Finding the Fourth Proportional to 438.95, 655.57 and 397.73

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Solution

The fourth proportional to 438.95, 655.57 and 397.73 is: 594.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.95 : 655.57 = 397.73 : x
  2. Step 2: Convert to fraction form
    438.95/655.57 = 397.73/x
  3. Step 3: Cross multiply
    438.95x = 655.57 × 397.73
  4. Step 4: Simplify right side
    438.95x = 260,741.99
  5. Step 5: Solve for x
    x = 260,741.99/438.95
  6. Step 6: Final answer
    x = 594.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.