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Finding the Fourth Proportional to 451.79, 677.70 and 268.78

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Solution

The fourth proportional to 451.79, 677.70 and 268.78 is: 403.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.79 : 677.70 = 268.78 : x
  2. Step 2: Convert to fraction form
    451.79/677.70 = 268.78/x
  3. Step 3: Cross multiply
    451.79x = 677.70 × 268.78
  4. Step 4: Simplify right side
    451.79x = 182,152.21
  5. Step 5: Solve for x
    x = 182,152.21/451.79
  6. Step 6: Final answer
    x = 403.18

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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.