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Finding the Fourth Proportional to 794.64, 1,185.75 and 712.65

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Solution

The fourth proportional to 794.64, 1,185.75 and 712.65 is: 1,063.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.64 : 1,185.75 = 712.65 : x
  2. Step 2: Convert to fraction form
    794.64/1,185.75 = 712.65/x
  3. Step 3: Cross multiply
    794.64x = 1,185.75 × 712.65
  4. Step 4: Simplify right side
    794.64x = 845,024.74
  5. Step 5: Solve for x
    x = 845,024.74/794.64
  6. Step 6: Final answer
    x = 1,063.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.