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Finding the Fourth Proportional to 448.30, 672.54 and 311.38

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Solution

The fourth proportional to 448.30, 672.54 and 311.38 is: 467.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.30 : 672.54 = 311.38 : x
  2. Step 2: Convert to fraction form
    448.30/672.54 = 311.38/x
  3. Step 3: Cross multiply
    448.30x = 672.54 × 311.38
  4. Step 4: Simplify right side
    448.30x = 209,415.51
  5. Step 5: Solve for x
    x = 209,415.51/448.30
  6. Step 6: Final answer
    x = 467.13

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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.