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Finding the Fourth Proportional to 451.54, 619.76 and 401.32

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Solution

The fourth proportional to 451.54, 619.76 and 401.32 is: 550.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.54 : 619.76 = 401.32 : x
  2. Step 2: Convert to fraction form
    451.54/619.76 = 401.32/x
  3. Step 3: Cross multiply
    451.54x = 619.76 × 401.32
  4. Step 4: Simplify right side
    451.54x = 248,722.08
  5. Step 5: Solve for x
    x = 248,722.08/451.54
  6. Step 6: Final answer
    x = 550.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.