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Finding the Fourth Proportional to 336.95, 505.57 and 142.00

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Solution

The fourth proportional to 336.95, 505.57 and 142.00 is: 213.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.95 : 505.57 = 142.00 : x
  2. Step 2: Convert to fraction form
    336.95/505.57 = 142.00/x
  3. Step 3: Cross multiply
    336.95x = 505.57 × 142.00
  4. Step 4: Simplify right side
    336.95x = 71,788.41
  5. Step 5: Solve for x
    x = 71,788.41/336.95
  6. Step 6: Final answer
    x = 213.05

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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.