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Finding the Fourth Proportional to 774.35, 1,068.62 and 442.68

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Solution

The fourth proportional to 774.35, 1,068.62 and 442.68 is: 610.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.35 : 1,068.62 = 442.68 : x
  2. Step 2: Convert to fraction form
    774.35/1,068.62 = 442.68/x
  3. Step 3: Cross multiply
    774.35x = 1,068.62 × 442.68
  4. Step 4: Simplify right side
    774.35x = 473,054.49
  5. Step 5: Solve for x
    x = 473,054.49/774.35
  6. Step 6: Final answer
    x = 610.91

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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.