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Finding the Fourth Proportional to 1,763.28, 2,644.12 and 666.86

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Solution

The fourth proportional to 1,763.28, 2,644.12 and 666.86 is: 999.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,763.28 : 2,644.12 = 666.86 : x
  2. Step 2: Convert to fraction form
    1,763.28/2,644.12 = 666.86/x
  3. Step 3: Cross multiply
    1,763.28x = 2,644.12 × 666.86
  4. Step 4: Simplify right side
    1,763.28x = 1,763,257.86
  5. Step 5: Solve for x
    x = 1,763,257.86/1,763.28
  6. Step 6: Final answer
    x = 999.99

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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.