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Finding the Fourth Proportional to 506.77, 698.98 and 489.83

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Solution

The fourth proportional to 506.77, 698.98 and 489.83 is: 675.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.77 : 698.98 = 489.83 : x
  2. Step 2: Convert to fraction form
    506.77/698.98 = 489.83/x
  3. Step 3: Cross multiply
    506.77x = 698.98 × 489.83
  4. Step 4: Simplify right side
    506.77x = 342,383.73
  5. Step 5: Solve for x
    x = 342,383.73/506.77
  6. Step 6: Final answer
    x = 675.62

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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.