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Finding the Fourth Proportional to 774.54, 1,068.90 and 443.25

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Solution

The fourth proportional to 774.54, 1,068.90 and 443.25 is: 611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.54 : 1,068.90 = 443.25 : x
  2. Step 2: Convert to fraction form
    774.54/1,068.90 = 443.25/x
  3. Step 3: Cross multiply
    774.54x = 1,068.90 × 443.25
  4. Step 4: Simplify right side
    774.54x = 473,789.93
  5. Step 5: Solve for x
    x = 473,789.93/774.54
  6. Step 6: Final answer
    x = 611.70

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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.