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Finding the Fourth Proportional to 344.40, 518.96 and 284.86

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Solution

The fourth proportional to 344.40, 518.96 and 284.86 is: 429.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.40 : 518.96 = 284.86 : x
  2. Step 2: Convert to fraction form
    344.40/518.96 = 284.86/x
  3. Step 3: Cross multiply
    344.40x = 518.96 × 284.86
  4. Step 4: Simplify right side
    344.40x = 147,830.95
  5. Step 5: Solve for x
    x = 147,830.95/344.40
  6. Step 6: Final answer
    x = 429.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.