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Finding the Fourth Proportional to 774.23, 1,068.42 and 442.65

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Solution

The fourth proportional to 774.23, 1,068.42 and 442.65 is: 610.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.23 : 1,068.42 = 442.65 : x
  2. Step 2: Convert to fraction form
    774.23/1,068.42 = 442.65/x
  3. Step 3: Cross multiply
    774.23x = 1,068.42 × 442.65
  4. Step 4: Simplify right side
    774.23x = 472,936.11
  5. Step 5: Solve for x
    x = 472,936.11/774.23
  6. Step 6: Final answer
    x = 610.85

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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.