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Finding the Fourth Proportional to 1,296.48, 1,941.66 and 906.86

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Solution

The fourth proportional to 1,296.48, 1,941.66 and 906.86 is: 1,358.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.48 : 1,941.66 = 906.86 : x
  2. Step 2: Convert to fraction form
    1,296.48/1,941.66 = 906.86/x
  3. Step 3: Cross multiply
    1,296.48x = 1,941.66 × 906.86
  4. Step 4: Simplify right side
    1,296.48x = 1,760,813.79
  5. Step 5: Solve for x
    x = 1,760,813.79/1,296.48
  6. Step 6: Final answer
    x = 1,358.15

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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.