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Finding the Fourth Proportional to 448.20, 672.29 and 123.56

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Solution

The fourth proportional to 448.20, 672.29 and 123.56 is: 185.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.20 : 672.29 = 123.56 : x
  2. Step 2: Convert to fraction form
    448.20/672.29 = 123.56/x
  3. Step 3: Cross multiply
    448.20x = 672.29 × 123.56
  4. Step 4: Simplify right side
    448.20x = 83,071.63
  5. Step 5: Solve for x
    x = 83,071.63/448.20
  6. Step 6: Final answer
    x = 185.35

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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.