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Finding the Fourth Proportional to 666.92, 994.49 and 641.00

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Solution

The fourth proportional to 666.92, 994.49 and 641.00 is: 955.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.92 : 994.49 = 641.00 : x
  2. Step 2: Convert to fraction form
    666.92/994.49 = 641.00/x
  3. Step 3: Cross multiply
    666.92x = 994.49 × 641.00
  4. Step 4: Simplify right side
    666.92x = 637,459.91
  5. Step 5: Solve for x
    x = 637,459.91/666.92
  6. Step 6: Final answer
    x = 955.83

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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.