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Finding the Fourth Proportional to 1,204.65, 1,662.70 and 784.27

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Solution

The fourth proportional to 1,204.65, 1,662.70 and 784.27 is: 1,082.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.65 : 1,662.70 = 784.27 : x
  2. Step 2: Convert to fraction form
    1,204.65/1,662.70 = 784.27/x
  3. Step 3: Cross multiply
    1,204.65x = 1,662.70 × 784.27
  4. Step 4: Simplify right side
    1,204.65x = 1,304,012.73
  5. Step 5: Solve for x
    x = 1,304,012.73/1,204.65
  6. Step 6: Final answer
    x = 1,082.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.