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Finding the Fourth Proportional to 1,189.52, 1,639.52 and 835.56

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Solution

The fourth proportional to 1,189.52, 1,639.52 and 835.56 is: 1,151.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.52 : 1,639.52 = 835.56 : x
  2. Step 2: Convert to fraction form
    1,189.52/1,639.52 = 835.56/x
  3. Step 3: Cross multiply
    1,189.52x = 1,639.52 × 835.56
  4. Step 4: Simplify right side
    1,189.52x = 1,369,917.33
  5. Step 5: Solve for x
    x = 1,369,917.33/1,189.52
  6. Step 6: Final answer
    x = 1,151.66

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1.5x scale

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.