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Finding the Fourth Proportional to 450.81, 677.25 and 420.84

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Solution

The fourth proportional to 450.81, 677.25 and 420.84 is: 632.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.81 : 677.25 = 420.84 : x
  2. Step 2: Convert to fraction form
    450.81/677.25 = 420.84/x
  3. Step 3: Cross multiply
    450.81x = 677.25 × 420.84
  4. Step 4: Simplify right side
    450.81x = 285,013.89
  5. Step 5: Solve for x
    x = 285,013.89/450.81
  6. Step 6: Final answer
    x = 632.23

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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.