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Finding the Fourth Proportional to 620.69, 860.81 and 598.82

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Solution

The fourth proportional to 620.69, 860.81 and 598.82 is: 830.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.69 : 860.81 = 598.82 : x
  2. Step 2: Convert to fraction form
    620.69/860.81 = 598.82/x
  3. Step 3: Cross multiply
    620.69x = 860.81 × 598.82
  4. Step 4: Simplify right side
    620.69x = 515,462.95
  5. Step 5: Solve for x
    x = 515,462.95/620.69
  6. Step 6: Final answer
    x = 830.47

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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.