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Finding the Fourth Proportional to 1,232.15, 1,698.85 and 765.59

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Solution

The fourth proportional to 1,232.15, 1,698.85 and 765.59 is: 1,055.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,232.15 : 1,698.85 = 765.59 : x
  2. Step 2: Convert to fraction form
    1,232.15/1,698.85 = 765.59/x
  3. Step 3: Cross multiply
    1,232.15x = 1,698.85 × 765.59
  4. Step 4: Simplify right side
    1,232.15x = 1,300,622.57
  5. Step 5: Solve for x
    x = 1,300,622.57/1,232.15
  6. Step 6: Final answer
    x = 1,055.57

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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.