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Finding the Fourth Proportional to 1,209.04, 1,814.10 and 559.42

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Solution

The fourth proportional to 1,209.04, 1,814.10 and 559.42 is: 839.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.04 : 1,814.10 = 559.42 : x
  2. Step 2: Convert to fraction form
    1,209.04/1,814.10 = 559.42/x
  3. Step 3: Cross multiply
    1,209.04x = 1,814.10 × 559.42
  4. Step 4: Simplify right side
    1,209.04x = 1,014,843.82
  5. Step 5: Solve for x
    x = 1,014,843.82/1,209.04
  6. Step 6: Final answer
    x = 839.38

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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.