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Finding the Fourth Proportional to 447.93, 671.96 and 155.40

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Solution

The fourth proportional to 447.93, 671.96 and 155.40 is: 233.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.93 : 671.96 = 155.40 : x
  2. Step 2: Convert to fraction form
    447.93/671.96 = 155.40/x
  3. Step 3: Cross multiply
    447.93x = 671.96 × 155.40
  4. Step 4: Simplify right side
    447.93x = 104,421.81
  5. Step 5: Solve for x
    x = 104,421.81/447.93
  6. Step 6: Final answer
    x = 233.12

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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.