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Finding the Fourth Proportional to 448.15, 672.62 and 399.32

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Solution

The fourth proportional to 448.15, 672.62 and 399.32 is: 599.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.15 : 672.62 = 399.32 : x
  2. Step 2: Convert to fraction form
    448.15/672.62 = 399.32/x
  3. Step 3: Cross multiply
    448.15x = 672.62 × 399.32
  4. Step 4: Simplify right side
    448.15x = 268,590.62
  5. Step 5: Solve for x
    x = 268,590.62/448.15
  6. Step 6: Final answer
    x = 599.33

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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.