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Finding the Fourth Proportional to 724.06, 999.35 and 491.26

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Solution

The fourth proportional to 724.06, 999.35 and 491.26 is: 678.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.06 : 999.35 = 491.26 : x
  2. Step 2: Convert to fraction form
    724.06/999.35 = 491.26/x
  3. Step 3: Cross multiply
    724.06x = 999.35 × 491.26
  4. Step 4: Simplify right side
    724.06x = 490,940.68
  5. Step 5: Solve for x
    x = 490,940.68/724.06
  6. Step 6: Final answer
    x = 678.04

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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.