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Finding the Fourth Proportional to 671.73, 1,005.17 and 555.09

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Solution

The fourth proportional to 671.73, 1,005.17 and 555.09 is: 830.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.73 : 1,005.17 = 555.09 : x
  2. Step 2: Convert to fraction form
    671.73/1,005.17 = 555.09/x
  3. Step 3: Cross multiply
    671.73x = 1,005.17 × 555.09
  4. Step 4: Simplify right side
    671.73x = 557,957.04
  5. Step 5: Solve for x
    x = 557,957.04/671.73
  6. Step 6: Final answer
    x = 830.63

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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.