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Finding the Fourth Proportional to 1,096.79, 1,643.85 and 511.00

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Solution

The fourth proportional to 1,096.79, 1,643.85 and 511.00 is: 765.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,096.79 : 1,643.85 = 511.00 : x
  2. Step 2: Convert to fraction form
    1,096.79/1,643.85 = 511.00/x
  3. Step 3: Cross multiply
    1,096.79x = 1,643.85 × 511.00
  4. Step 4: Simplify right side
    1,096.79x = 840,003.24
  5. Step 5: Solve for x
    x = 840,003.24/1,096.79
  6. Step 6: Final answer
    x = 765.88

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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.