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Finding the Fourth Proportional to 1,296.70, 1,945.95 and 835.60

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Solution

The fourth proportional to 1,296.70, 1,945.95 and 835.60 is: 1,253.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.70 : 1,945.95 = 835.60 : x
  2. Step 2: Convert to fraction form
    1,296.70/1,945.95 = 835.60/x
  3. Step 3: Cross multiply
    1,296.70x = 1,945.95 × 835.60
  4. Step 4: Simplify right side
    1,296.70x = 1,626,035.82
  5. Step 5: Solve for x
    x = 1,626,035.82/1,296.70
  6. Step 6: Final answer
    x = 1,253.98

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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.