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Finding the Fourth Proportional to 336.40, 504.36 and 143.92

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Solution

The fourth proportional to 336.40, 504.36 and 143.92 is: 215.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.40 : 504.36 = 143.92 : x
  2. Step 2: Convert to fraction form
    336.40/504.36 = 143.92/x
  3. Step 3: Cross multiply
    336.40x = 504.36 × 143.92
  4. Step 4: Simplify right side
    336.40x = 72,587.49
  5. Step 5: Solve for x
    x = 72,587.49/336.40
  6. Step 6: Final answer
    x = 215.78

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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.