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Finding the Fourth Proportional to 488.64, 674.46 and 322.86

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Solution

The fourth proportional to 488.64, 674.46 and 322.86 is: 445.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.64 : 674.46 = 322.86 : x
  2. Step 2: Convert to fraction form
    488.64/674.46 = 322.86/x
  3. Step 3: Cross multiply
    488.64x = 674.46 × 322.86
  4. Step 4: Simplify right side
    488.64x = 217,756.16
  5. Step 5: Solve for x
    x = 217,756.16/488.64
  6. Step 6: Final answer
    x = 445.64

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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.