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Finding the Fourth Proportional to 926.12, 1,278.06 and 512.12

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Solution

The fourth proportional to 926.12, 1,278.06 and 512.12 is: 706.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.12 : 1,278.06 = 512.12 : x
  2. Step 2: Convert to fraction form
    926.12/1,278.06 = 512.12/x
  3. Step 3: Cross multiply
    926.12x = 1,278.06 × 512.12
  4. Step 4: Simplify right side
    926.12x = 654,520.09
  5. Step 5: Solve for x
    x = 654,520.09/926.12
  6. Step 6: Final answer
    x = 706.73

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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.