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Finding the Fourth Proportional to 580.06, 799.67 and 491.19

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Solution

The fourth proportional to 580.06, 799.67 and 491.19 is: 677.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.06 : 799.67 = 491.19 : x
  2. Step 2: Convert to fraction form
    580.06/799.67 = 491.19/x
  3. Step 3: Cross multiply
    580.06x = 799.67 × 491.19
  4. Step 4: Simplify right side
    580.06x = 392,789.91
  5. Step 5: Solve for x
    x = 392,789.91/580.06
  6. Step 6: Final answer
    x = 677.15

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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.