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Finding the Fourth Proportional to 450.51, 623.49 and 388.56

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Solution

The fourth proportional to 450.51, 623.49 and 388.56 is: 537.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.51 : 623.49 = 388.56 : x
  2. Step 2: Convert to fraction form
    450.51/623.49 = 388.56/x
  3. Step 3: Cross multiply
    450.51x = 623.49 × 388.56
  4. Step 4: Simplify right side
    450.51x = 242,263.27
  5. Step 5: Solve for x
    x = 242,263.27/450.51
  6. Step 6: Final answer
    x = 537.75

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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.