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Finding the Fourth Proportional to 1,137.33, 1,707.82 and 859.70

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Solution

The fourth proportional to 1,137.33, 1,707.82 and 859.70 is: 1,290.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.33 : 1,707.82 = 859.70 : x
  2. Step 2: Convert to fraction form
    1,137.33/1,707.82 = 859.70/x
  3. Step 3: Cross multiply
    1,137.33x = 1,707.82 × 859.70
  4. Step 4: Simplify right side
    1,137.33x = 1,468,214.97
  5. Step 5: Solve for x
    x = 1,468,214.97/1,137.33
  6. Step 6: Final answer
    x = 1,290.93

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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.