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Finding the Fourth Proportional to 1,109.99, 1,663.80 and 835.23

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Solution

The fourth proportional to 1,109.99, 1,663.80 and 835.23 is: 1,251.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.99 : 1,663.80 = 835.23 : x
  2. Step 2: Convert to fraction form
    1,109.99/1,663.80 = 835.23/x
  3. Step 3: Cross multiply
    1,109.99x = 1,663.80 × 835.23
  4. Step 4: Simplify right side
    1,109.99x = 1,389,653.59
  5. Step 5: Solve for x
    x = 1,389,653.59/1,109.99
  6. Step 6: Final answer
    x = 1,251.95

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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.