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Finding the Fourth Proportional to 719.04, 989.10 and 634.59

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Solution

The fourth proportional to 719.04, 989.10 and 634.59 is: 872.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.04 : 989.10 = 634.59 : x
  2. Step 2: Convert to fraction form
    719.04/989.10 = 634.59/x
  3. Step 3: Cross multiply
    719.04x = 989.10 × 634.59
  4. Step 4: Simplify right side
    719.04x = 627,672.97
  5. Step 5: Solve for x
    x = 627,672.97/719.04
  6. Step 6: Final answer
    x = 872.93

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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.