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Finding the Fourth Proportional to 445.89, 671.31 and 348.91

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Solution

The fourth proportional to 445.89, 671.31 and 348.91 is: 525.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.89 : 671.31 = 348.91 : x
  2. Step 2: Convert to fraction form
    445.89/671.31 = 348.91/x
  3. Step 3: Cross multiply
    445.89x = 671.31 × 348.91
  4. Step 4: Simplify right side
    445.89x = 234,225.03
  5. Step 5: Solve for x
    x = 234,225.03/445.89
  6. Step 6: Final answer
    x = 525.30

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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.