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Finding the Fourth Proportional to 448.40, 672.96 and 243.11

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Solution

The fourth proportional to 448.40, 672.96 and 243.11 is: 364.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.40 : 672.96 = 243.11 : x
  2. Step 2: Convert to fraction form
    448.40/672.96 = 243.11/x
  3. Step 3: Cross multiply
    448.40x = 672.96 × 243.11
  4. Step 4: Simplify right side
    448.40x = 163,603.31
  5. Step 5: Solve for x
    x = 163,603.31/448.40
  6. Step 6: Final answer
    x = 364.86

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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.