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Finding the Fourth Proportional to 640.19, 957.24 and 493.98

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Solution

The fourth proportional to 640.19, 957.24 and 493.98 is: 738.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.19 : 957.24 = 493.98 : x
  2. Step 2: Convert to fraction form
    640.19/957.24 = 493.98/x
  3. Step 3: Cross multiply
    640.19x = 957.24 × 493.98
  4. Step 4: Simplify right side
    640.19x = 472,857.42
  5. Step 5: Solve for x
    x = 472,857.42/640.19
  6. Step 6: Final answer
    x = 738.63

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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.