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Finding the Fourth Proportional to 1,006.03, 1,511.48 and 641.53

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Solution

The fourth proportional to 1,006.03, 1,511.48 and 641.53 is: 963.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.03 : 1,511.48 = 641.53 : x
  2. Step 2: Convert to fraction form
    1,006.03/1,511.48 = 641.53/x
  3. Step 3: Cross multiply
    1,006.03x = 1,511.48 × 641.53
  4. Step 4: Simplify right side
    1,006.03x = 969,659.76
  5. Step 5: Solve for x
    x = 969,659.76/1,006.03
  6. Step 6: Final answer
    x = 963.85

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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.