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Finding the Fourth Proportional to 719.18, 991.85 and 579.25

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Solution

The fourth proportional to 719.18, 991.85 and 579.25 is: 798.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.18 : 991.85 = 579.25 : x
  2. Step 2: Convert to fraction form
    719.18/991.85 = 579.25/x
  3. Step 3: Cross multiply
    719.18x = 991.85 × 579.25
  4. Step 4: Simplify right side
    719.18x = 574,529.11
  5. Step 5: Solve for x
    x = 574,529.11/719.18
  6. Step 6: Final answer
    x = 798.87

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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.