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Finding the Fourth Proportional to 893.90, 1,337.70 and 779.60

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Solution

The fourth proportional to 893.90, 1,337.70 and 779.60 is: 1,166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.90 : 1,337.70 = 779.60 : x
  2. Step 2: Convert to fraction form
    893.90/1,337.70 = 779.60/x
  3. Step 3: Cross multiply
    893.90x = 1,337.70 × 779.60
  4. Step 4: Simplify right side
    893.90x = 1,042,870.92
  5. Step 5: Solve for x
    x = 1,042,870.92/893.90
  6. Step 6: Final answer
    x = 1,166.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.