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Finding the Fourth Proportional to 302.58, 453.96 and 140.40

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Solution

The fourth proportional to 302.58, 453.96 and 140.40 is: 210.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.58 : 453.96 = 140.40 : x
  2. Step 2: Convert to fraction form
    302.58/453.96 = 140.40/x
  3. Step 3: Cross multiply
    302.58x = 453.96 × 140.40
  4. Step 4: Simplify right side
    302.58x = 63,735.98
  5. Step 5: Solve for x
    x = 63,735.98/302.58
  6. Step 6: Final answer
    x = 210.64

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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.