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Finding the Fourth Proportional to 418.89, 577.97 and 319.28

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Solution

The fourth proportional to 418.89, 577.97 and 319.28 is: 440.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.89 : 577.97 = 319.28 : x
  2. Step 2: Convert to fraction form
    418.89/577.97 = 319.28/x
  3. Step 3: Cross multiply
    418.89x = 577.97 × 319.28
  4. Step 4: Simplify right side
    418.89x = 184,529.78
  5. Step 5: Solve for x
    x = 184,529.78/418.89
  6. Step 6: Final answer
    x = 440.52

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.