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Finding the Fourth Proportional to 774.38, 1,068.67 and 442.83

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Solution

The fourth proportional to 774.38, 1,068.67 and 442.83 is: 611.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.38 : 1,068.67 = 442.83 : x
  2. Step 2: Convert to fraction form
    774.38/1,068.67 = 442.83/x
  3. Step 3: Cross multiply
    774.38x = 1,068.67 × 442.83
  4. Step 4: Simplify right side
    774.38x = 473,239.14
  5. Step 5: Solve for x
    x = 473,239.14/774.38
  6. Step 6: Final answer
    x = 611.12

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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.