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Finding the Fourth Proportional to 448.03, 672.05 and 123.40

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Solution

The fourth proportional to 448.03, 672.05 and 123.40 is: 185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.03 : 672.05 = 123.40 : x
  2. Step 2: Convert to fraction form
    448.03/672.05 = 123.40/x
  3. Step 3: Cross multiply
    448.03x = 672.05 × 123.40
  4. Step 4: Simplify right side
    448.03x = 82,929.53
  5. Step 5: Solve for x
    x = 82,929.53/448.03
  6. Step 6: Final answer
    x = 185.10

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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.