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Finding the Fourth Proportional to 448.40, 672.60 and 302.60

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Solution

The fourth proportional to 448.40, 672.60 and 302.60 is: 453.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.40 : 672.60 = 302.60 : x
  2. Step 2: Convert to fraction form
    448.40/672.60 = 302.60/x
  3. Step 3: Cross multiply
    448.40x = 672.60 × 302.60
  4. Step 4: Simplify right side
    448.40x = 203,528.76
  5. Step 5: Solve for x
    x = 203,528.76/448.40
  6. Step 6: Final answer
    x = 453.90

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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.