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Finding the Fourth Proportional to 302.70, 453.45 and 281.10

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Solution

The fourth proportional to 302.70, 453.45 and 281.10 is: 421.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.70 : 453.45 = 281.10 : x
  2. Step 2: Convert to fraction form
    302.70/453.45 = 281.10/x
  3. Step 3: Cross multiply
    302.70x = 453.45 × 281.10
  4. Step 4: Simplify right side
    302.70x = 127,464.80
  5. Step 5: Solve for x
    x = 127,464.80/302.70
  6. Step 6: Final answer
    x = 421.09

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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.