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Finding the Fourth Proportional to 774.01, 1,068.21 and 442.49

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Solution

The fourth proportional to 774.01, 1,068.21 and 442.49 is: 610.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.01 : 1,068.21 = 442.49 : x
  2. Step 2: Convert to fraction form
    774.01/1,068.21 = 442.49/x
  3. Step 3: Cross multiply
    774.01x = 1,068.21 × 442.49
  4. Step 4: Simplify right side
    774.01x = 472,671.15
  5. Step 5: Solve for x
    x = 472,671.15/774.01
  6. Step 6: Final answer
    x = 610.68

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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.