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Finding the Fourth Proportional to 302.56, 453.38 and 140.05

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Solution

The fourth proportional to 302.56, 453.38 and 140.05 is: 209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.56 : 453.38 = 140.05 : x
  2. Step 2: Convert to fraction form
    302.56/453.38 = 140.05/x
  3. Step 3: Cross multiply
    302.56x = 453.38 × 140.05
  4. Step 4: Simplify right side
    302.56x = 63,497.35
  5. Step 5: Solve for x
    x = 63,497.35/302.56
  6. Step 6: Final answer
    x = 209.87

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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.