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Finding the Fourth Proportional to 620.82, 860.64 and 589.56

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Solution

The fourth proportional to 620.82, 860.64 and 589.56 is: 817.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.82 : 860.64 = 589.56 : x
  2. Step 2: Convert to fraction form
    620.82/860.64 = 589.56/x
  3. Step 3: Cross multiply
    620.82x = 860.64 × 589.56
  4. Step 4: Simplify right side
    620.82x = 507,398.92
  5. Step 5: Solve for x
    x = 507,398.92/620.82
  6. Step 6: Final answer
    x = 817.30

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.