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Finding the Fourth Proportional to 302.80, 453.72 and 140.38

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Solution

The fourth proportional to 302.80, 453.72 and 140.38 is: 210.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.80 : 453.72 = 140.38 : x
  2. Step 2: Convert to fraction form
    302.80/453.72 = 140.38/x
  3. Step 3: Cross multiply
    302.80x = 453.72 × 140.38
  4. Step 4: Simplify right side
    302.80x = 63,693.21
  5. Step 5: Solve for x
    x = 63,693.21/302.80
  6. Step 6: Final answer
    x = 210.35

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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.