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Finding the Fourth Proportional to 936.56, 1,403.64 and 448.88

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Solution

The fourth proportional to 936.56, 1,403.64 and 448.88 is: 672.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.56 : 1,403.64 = 448.88 : x
  2. Step 2: Convert to fraction form
    936.56/1,403.64 = 448.88/x
  3. Step 3: Cross multiply
    936.56x = 1,403.64 × 448.88
  4. Step 4: Simplify right side
    936.56x = 630,065.92
  5. Step 5: Solve for x
    x = 630,065.92/936.56
  6. Step 6: Final answer
    x = 672.74

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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.