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Finding the Fourth Proportional to 668,759.86, 1,003,128.16 and 269,390.42

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Solution

The fourth proportional to 668,759.86, 1,003,128.16 and 269,390.42 is: 404,080.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,759.86 : 1,003,128.16 = 269,390.42 : x
  2. Step 2: Convert to fraction form
    668,759.86/1,003,128.16 = 269,390.42/x
  3. Step 3: Cross multiply
    668,759.86x = 1,003,128.16 × 269,390.42
  4. Step 4: Simplify right side
    668,759.86x = 270,233,116,336.23
  5. Step 5: Solve for x
    x = 270,233,116,336.23/668,759.86
  6. Step 6: Final answer
    x = 404,080.95

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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.