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Finding the Fourth Proportional to 490,443.26, 676,790.10 and 286,513.07

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Solution

The fourth proportional to 490,443.26, 676,790.10 and 286,513.07 is: 395,375.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,443.26 : 676,790.10 = 286,513.07 : x
  2. Step 2: Convert to fraction form
    490,443.26/676,790.10 = 286,513.07/x
  3. Step 3: Cross multiply
    490,443.26x = 676,790.10 × 286,513.07
  4. Step 4: Simplify right side
    490,443.26x = 193,909,205,912.66
  5. Step 5: Solve for x
    x = 193,909,205,912.66/490,443.26
  6. Step 6: Final answer
    x = 395,375.42

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1.5x scale

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.