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Finding the Fourth Proportional to 448.02, 672.02 and 123.43

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Solution

The fourth proportional to 448.02, 672.02 and 123.43 is: 185.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.02 : 672.02 = 123.43 : x
  2. Step 2: Convert to fraction form
    448.02/672.02 = 123.43/x
  3. Step 3: Cross multiply
    448.02x = 672.02 × 123.43
  4. Step 4: Simplify right side
    448.02x = 82,947.74
  5. Step 5: Solve for x
    x = 82,947.74/448.02
  6. Step 6: Final answer
    x = 185.15

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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.