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Finding the Fourth Proportional to 926.82, 1,278.09 and 623.39

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Solution

The fourth proportional to 926.82, 1,278.09 and 623.39 is: 859.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.82 : 1,278.09 = 623.39 : x
  2. Step 2: Convert to fraction form
    926.82/1,278.09 = 623.39/x
  3. Step 3: Cross multiply
    926.82x = 1,278.09 × 623.39
  4. Step 4: Simplify right side
    926.82x = 796,742.13
  5. Step 5: Solve for x
    x = 796,742.13/926.82
  6. Step 6: Final answer
    x = 859.65

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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.