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Finding the Fourth Proportional to 448.39, 672.40 and 140.14

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Solution

The fourth proportional to 448.39, 672.40 and 140.14 is: 210.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.39 : 672.40 = 140.14 : x
  2. Step 2: Convert to fraction form
    448.39/672.40 = 140.14/x
  3. Step 3: Cross multiply
    448.39x = 672.40 × 140.14
  4. Step 4: Simplify right side
    448.39x = 94,230.14
  5. Step 5: Solve for x
    x = 94,230.14/448.39
  6. Step 6: Final answer
    x = 210.15

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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.