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Finding the Fourth Proportional to 335.78, 503.88 and 143.41

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Solution

The fourth proportional to 335.78, 503.88 and 143.41 is: 215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.78 : 503.88 = 143.41 : x
  2. Step 2: Convert to fraction form
    335.78/503.88 = 143.41/x
  3. Step 3: Cross multiply
    335.78x = 503.88 × 143.41
  4. Step 4: Simplify right side
    335.78x = 72,261.43
  5. Step 5: Solve for x
    x = 72,261.43/335.78
  6. Step 6: Final answer
    x = 215.20

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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.