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Finding the Fourth Proportional to 448.23, 671.02 and 429.20

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Solution

The fourth proportional to 448.23, 671.02 and 429.20 is: 642.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.23 : 671.02 = 429.20 : x
  2. Step 2: Convert to fraction form
    448.23/671.02 = 429.20/x
  3. Step 3: Cross multiply
    448.23x = 671.02 × 429.20
  4. Step 4: Simplify right side
    448.23x = 287,999.87
  5. Step 5: Solve for x
    x = 287,999.87/448.23
  6. Step 6: Final answer
    x = 642.53

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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.