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Finding the Fourth Proportional to 1,052.73, 1,579.19 and 641.66

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Solution

The fourth proportional to 1,052.73, 1,579.19 and 641.66 is: 962.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.73 : 1,579.19 = 641.66 : x
  2. Step 2: Convert to fraction form
    1,052.73/1,579.19 = 641.66/x
  3. Step 3: Cross multiply
    1,052.73x = 1,579.19 × 641.66
  4. Step 4: Simplify right side
    1,052.73x = 1,013,291.95
  5. Step 5: Solve for x
    x = 1,013,291.95/1,052.73
  6. Step 6: Final answer
    x = 962.54

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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.