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Finding the Fourth Proportional to 626.13, 864 and 579.69

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Solution

The fourth proportional to 626.13, 864 and 579.69 is: 799.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.13 : 864 = 579.69 : x
  2. Step 2: Convert to fraction form
    626.13/864 = 579.69/x
  3. Step 3: Cross multiply
    626.13x = 864 × 579.69
  4. Step 4: Simplify right side
    626.13x = 500,852.16
  5. Step 5: Solve for x
    x = 500,852.16/626.13
  6. Step 6: Final answer
    x = 799.92

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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.