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Finding the Fourth Proportional to 489.58, 680.36 and 483.46

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Solution

The fourth proportional to 489.58, 680.36 and 483.46 is: 671.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.58 : 680.36 = 483.46 : x
  2. Step 2: Convert to fraction form
    489.58/680.36 = 483.46/x
  3. Step 3: Cross multiply
    489.58x = 680.36 × 483.46
  4. Step 4: Simplify right side
    489.58x = 328,926.85
  5. Step 5: Solve for x
    x = 328,926.85/489.58
  6. Step 6: Final answer
    x = 671.86

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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.