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Finding the Fourth Proportional to 854.68, 1,179.63 and 559.84

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Solution

The fourth proportional to 854.68, 1,179.63 and 559.84 is: 772.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.68 : 1,179.63 = 559.84 : x
  2. Step 2: Convert to fraction form
    854.68/1,179.63 = 559.84/x
  3. Step 3: Cross multiply
    854.68x = 1,179.63 × 559.84
  4. Step 4: Simplify right side
    854.68x = 660,404.06
  5. Step 5: Solve for x
    x = 660,404.06/854.68
  6. Step 6: Final answer
    x = 772.69

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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.