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Finding the Fourth Proportional to 448.50, 671.70 and 318.62

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Solution

The fourth proportional to 448.50, 671.70 and 318.62 is: 477.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.50 : 671.70 = 318.62 : x
  2. Step 2: Convert to fraction form
    448.50/671.70 = 318.62/x
  3. Step 3: Cross multiply
    448.50x = 671.70 × 318.62
  4. Step 4: Simplify right side
    448.50x = 214,017.05
  5. Step 5: Solve for x
    x = 214,017.05/448.50
  6. Step 6: Final answer
    x = 477.18

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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.