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Finding the Fourth Proportional to 451.44, 677.16 and 391.68

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Solution

The fourth proportional to 451.44, 677.16 and 391.68 is: 587.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.44 : 677.16 = 391.68 : x
  2. Step 2: Convert to fraction form
    451.44/677.16 = 391.68/x
  3. Step 3: Cross multiply
    451.44x = 677.16 × 391.68
  4. Step 4: Simplify right side
    451.44x = 265,230.03
  5. Step 5: Solve for x
    x = 265,230.03/451.44
  6. Step 6: Final answer
    x = 587.52

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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.