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Finding the Fourth Proportional to 847.11, 1,168.06 and 728.95

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Solution

The fourth proportional to 847.11, 1,168.06 and 728.95 is: 1,005.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.11 : 1,168.06 = 728.95 : x
  2. Step 2: Convert to fraction form
    847.11/1,168.06 = 728.95/x
  3. Step 3: Cross multiply
    847.11x = 1,168.06 × 728.95
  4. Step 4: Simplify right side
    847.11x = 851,457.34
  5. Step 5: Solve for x
    x = 851,457.34/847.11
  6. Step 6: Final answer
    x = 1,005.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.