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Finding the Fourth Proportional to 1,106.69, 1,661.06 and 559.26

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Solution

The fourth proportional to 1,106.69, 1,661.06 and 559.26 is: 839.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.69 : 1,661.06 = 559.26 : x
  2. Step 2: Convert to fraction form
    1,106.69/1,661.06 = 559.26/x
  3. Step 3: Cross multiply
    1,106.69x = 1,661.06 × 559.26
  4. Step 4: Simplify right side
    1,106.69x = 928,964.42
  5. Step 5: Solve for x
    x = 928,964.42/1,106.69
  6. Step 6: Final answer
    x = 839.41

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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.