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Finding the Fourth Proportional to 450.08, 620.51 and 387.62

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Solution

The fourth proportional to 450.08, 620.51 and 387.62 is: 534.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.08 : 620.51 = 387.62 : x
  2. Step 2: Convert to fraction form
    450.08/620.51 = 387.62/x
  3. Step 3: Cross multiply
    450.08x = 620.51 × 387.62
  4. Step 4: Simplify right side
    450.08x = 240,522.09
  5. Step 5: Solve for x
    x = 240,522.09/450.08
  6. Step 6: Final answer
    x = 534.40

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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.