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Finding the Fourth Proportional to 655.67, 904.07 and 489.35

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Solution

The fourth proportional to 655.67, 904.07 and 489.35 is: 674.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.67 : 904.07 = 489.35 : x
  2. Step 2: Convert to fraction form
    655.67/904.07 = 489.35/x
  3. Step 3: Cross multiply
    655.67x = 904.07 × 489.35
  4. Step 4: Simplify right side
    655.67x = 442,399.69
  5. Step 5: Solve for x
    x = 442,399.69/655.67
  6. Step 6: Final answer
    x = 674.73

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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.