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Finding the Fourth Proportional to 926.82, 1,278.95 and 553.73

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Solution

The fourth proportional to 926.82, 1,278.95 and 553.73 is: 764.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.82 : 1,278.95 = 553.73 : x
  2. Step 2: Convert to fraction form
    926.82/1,278.95 = 553.73/x
  3. Step 3: Cross multiply
    926.82x = 1,278.95 × 553.73
  4. Step 4: Simplify right side
    926.82x = 708,183.82
  5. Step 5: Solve for x
    x = 708,183.82/926.82
  6. Step 6: Final answer
    x = 764.10

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1.5x scale

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.