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Finding the Fourth Proportional to 340.89, 470.55 and 279.41

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Solution

The fourth proportional to 340.89, 470.55 and 279.41 is: 385.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.89 : 470.55 = 279.41 : x
  2. Step 2: Convert to fraction form
    340.89/470.55 = 279.41/x
  3. Step 3: Cross multiply
    340.89x = 470.55 × 279.41
  4. Step 4: Simplify right side
    340.89x = 131,474.02
  5. Step 5: Solve for x
    x = 131,474.02/340.89
  6. Step 6: Final answer
    x = 385.68

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Why These Related Problems?

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