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Finding the Fourth Proportional to 448.24, 672.38 and 140.08

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Solution

The fourth proportional to 448.24, 672.38 and 140.08 is: 210.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.24 : 672.38 = 140.08 : x
  2. Step 2: Convert to fraction form
    448.24/672.38 = 140.08/x
  3. Step 3: Cross multiply
    448.24x = 672.38 × 140.08
  4. Step 4: Simplify right side
    448.24x = 94,186.99
  5. Step 5: Solve for x
    x = 94,186.99/448.24
  6. Step 6: Final answer
    x = 210.13

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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.