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Finding the Fourth Proportional to 640.64, 957.45 and 467.67

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Solution

The fourth proportional to 640.64, 957.45 and 467.67 is: 698.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.64 : 957.45 = 467.67 : x
  2. Step 2: Convert to fraction form
    640.64/957.45 = 467.67/x
  3. Step 3: Cross multiply
    640.64x = 957.45 × 467.67
  4. Step 4: Simplify right side
    640.64x = 447,775.99
  5. Step 5: Solve for x
    x = 447,775.99/640.64
  6. Step 6: Final answer
    x = 698.95

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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.