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Finding the Fourth Proportional to 645.40, 966.48 and 336.16

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Solution

The fourth proportional to 645.40, 966.48 and 336.16 is: 503.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.40 : 966.48 = 336.16 : x
  2. Step 2: Convert to fraction form
    645.40/966.48 = 336.16/x
  3. Step 3: Cross multiply
    645.40x = 966.48 × 336.16
  4. Step 4: Simplify right side
    645.40x = 324,891.92
  5. Step 5: Solve for x
    x = 324,891.92/645.40
  6. Step 6: Final answer
    x = 503.40

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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.