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Finding the Fourth Proportional to 1,192.69, 1,790.14 and 859.49

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Solution

The fourth proportional to 1,192.69, 1,790.14 and 859.49 is: 1,290.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.69 : 1,790.14 = 859.49 : x
  2. Step 2: Convert to fraction form
    1,192.69/1,790.14 = 859.49/x
  3. Step 3: Cross multiply
    1,192.69x = 1,790.14 × 859.49
  4. Step 4: Simplify right side
    1,192.69x = 1,538,595.25
  5. Step 5: Solve for x
    x = 1,538,595.25/1,192.69
  6. Step 6: Final answer
    x = 1,290.02

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1.5x scale

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.