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Finding the Fourth Proportional to 1,160.49, 1,600.50 and 786.87

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Solution

The fourth proportional to 1,160.49, 1,600.50 and 786.87 is: 1,085.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160.49 : 1,600.50 = 786.87 : x
  2. Step 2: Convert to fraction form
    1,160.49/1,600.50 = 786.87/x
  3. Step 3: Cross multiply
    1,160.49x = 1,600.50 × 786.87
  4. Step 4: Simplify right side
    1,160.49x = 1,259,385.44
  5. Step 5: Solve for x
    x = 1,259,385.44/1,160.49
  6. Step 6: Final answer
    x = 1,085.22

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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.