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Finding the Fourth Proportional to 774.37, 1,068.63 and 442.78

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Solution

The fourth proportional to 774.37, 1,068.63 and 442.78 is: 611.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.37 : 1,068.63 = 442.78 : x
  2. Step 2: Convert to fraction form
    774.37/1,068.63 = 442.78/x
  3. Step 3: Cross multiply
    774.37x = 1,068.63 × 442.78
  4. Step 4: Simplify right side
    774.37x = 473,167.99
  5. Step 5: Solve for x
    x = 473,167.99/774.37
  6. Step 6: Final answer
    x = 611.04

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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.