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Finding the Fourth Proportional to 773.91, 1,068.12 and 442.35

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Solution

The fourth proportional to 773.91, 1,068.12 and 442.35 is: 610.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.91 : 1,068.12 = 442.35 : x
  2. Step 2: Convert to fraction form
    773.91/1,068.12 = 442.35/x
  3. Step 3: Cross multiply
    773.91x = 1,068.12 × 442.35
  4. Step 4: Simplify right side
    773.91x = 472,482.88
  5. Step 5: Solve for x
    x = 472,482.88/773.91
  6. Step 6: Final answer
    x = 610.51

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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.