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Finding the Fourth Proportional to 448.20, 672.15 and 159.57

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Solution

The fourth proportional to 448.20, 672.15 and 159.57 is: 239.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.20 : 672.15 = 159.57 : x
  2. Step 2: Convert to fraction form
    448.20/672.15 = 159.57/x
  3. Step 3: Cross multiply
    448.20x = 672.15 × 159.57
  4. Step 4: Simplify right side
    448.20x = 107,254.98
  5. Step 5: Solve for x
    x = 107,254.98/448.20
  6. Step 6: Final answer
    x = 239.30

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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.