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Finding the Fourth Proportional to 445.79, 671.16 and 386.25

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Solution

The fourth proportional to 445.79, 671.16 and 386.25 is: 581.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.79 : 671.16 = 386.25 : x
  2. Step 2: Convert to fraction form
    445.79/671.16 = 386.25/x
  3. Step 3: Cross multiply
    445.79x = 671.16 × 386.25
  4. Step 4: Simplify right side
    445.79x = 259,234.10
  5. Step 5: Solve for x
    x = 259,234.10/445.79
  6. Step 6: Final answer
    x = 581.52

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.