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Finding the Fourth Proportional to 847.03, 1,270.98 and 641.53

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Solution

The fourth proportional to 847.03, 1,270.98 and 641.53 is: 962.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.03 : 1,270.98 = 641.53 : x
  2. Step 2: Convert to fraction form
    847.03/1,270.98 = 641.53/x
  3. Step 3: Cross multiply
    847.03x = 1,270.98 × 641.53
  4. Step 4: Simplify right side
    847.03x = 815,371.80
  5. Step 5: Solve for x
    x = 815,371.80/847.03
  6. Step 6: Final answer
    x = 962.62

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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.