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Finding the Fourth Proportional to 448.84, 673.80 and 287.20

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Solution

The fourth proportional to 448.84, 673.80 and 287.20 is: 431.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.84 : 673.80 = 287.20 : x
  2. Step 2: Convert to fraction form
    448.84/673.80 = 287.20/x
  3. Step 3: Cross multiply
    448.84x = 673.80 × 287.20
  4. Step 4: Simplify right side
    448.84x = 193,515.36
  5. Step 5: Solve for x
    x = 193,515.36/448.84
  6. Step 6: Final answer
    x = 431.15

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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.