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Finding the Fourth Proportional to 448.58, 619.54 and 324.66

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Solution

The fourth proportional to 448.58, 619.54 and 324.66 is: 448.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.58 : 619.54 = 324.66 : x
  2. Step 2: Convert to fraction form
    448.58/619.54 = 324.66/x
  3. Step 3: Cross multiply
    448.58x = 619.54 × 324.66
  4. Step 4: Simplify right side
    448.58x = 201,139.86
  5. Step 5: Solve for x
    x = 201,139.86/448.58
  6. Step 6: Final answer
    x = 448.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.