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Finding the Fourth Proportional to 448.57, 672.87 and 140.44

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Solution

The fourth proportional to 448.57, 672.87 and 140.44 is: 210.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.57 : 672.87 = 140.44 : x
  2. Step 2: Convert to fraction form
    448.57/672.87 = 140.44/x
  3. Step 3: Cross multiply
    448.57x = 672.87 × 140.44
  4. Step 4: Simplify right side
    448.57x = 94,497.86
  5. Step 5: Solve for x
    x = 94,497.86/448.57
  6. Step 6: Final answer
    x = 210.66

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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.