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Finding the Fourth Proportional to 488.08, 730.20 and 426.64

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Solution

The fourth proportional to 488.08, 730.20 and 426.64 is: 638.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.08 : 730.20 = 426.64 : x
  2. Step 2: Convert to fraction form
    488.08/730.20 = 426.64/x
  3. Step 3: Cross multiply
    488.08x = 730.20 × 426.64
  4. Step 4: Simplify right side
    488.08x = 311,532.53
  5. Step 5: Solve for x
    x = 311,532.53/488.08
  6. Step 6: Final answer
    x = 638.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.