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Finding the Fourth Proportional to 448.17, 672.21 and 123.57

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Solution

The fourth proportional to 448.17, 672.21 and 123.57 is: 185.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.17 : 672.21 = 123.57 : x
  2. Step 2: Convert to fraction form
    448.17/672.21 = 123.57/x
  3. Step 3: Cross multiply
    448.17x = 672.21 × 123.57
  4. Step 4: Simplify right side
    448.17x = 83,064.99
  5. Step 5: Solve for x
    x = 83,064.99/448.17
  6. Step 6: Final answer
    x = 185.34

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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.