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Finding the Fourth Proportional to 483.70, 720.90 and 479.68

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Solution

The fourth proportional to 483.70, 720.90 and 479.68 is: 714.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.70 : 720.90 = 479.68 : x
  2. Step 2: Convert to fraction form
    483.70/720.90 = 479.68/x
  3. Step 3: Cross multiply
    483.70x = 720.90 × 479.68
  4. Step 4: Simplify right side
    483.70x = 345,801.31
  5. Step 5: Solve for x
    x = 345,801.31/483.70
  6. Step 6: Final answer
    x = 714.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.