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Finding the Fourth Proportional to 450.30, 674.64 and 385.50

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Solution

The fourth proportional to 450.30, 674.64 and 385.50 is: 577.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.30 : 674.64 = 385.50 : x
  2. Step 2: Convert to fraction form
    450.30/674.64 = 385.50/x
  3. Step 3: Cross multiply
    450.30x = 674.64 × 385.50
  4. Step 4: Simplify right side
    450.30x = 260,073.72
  5. Step 5: Solve for x
    x = 260,073.72/450.30
  6. Step 6: Final answer
    x = 577.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.