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Finding the Fourth Proportional to 641,139.90, 884,695.97 and 369,296.21

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Solution

The fourth proportional to 641,139.90, 884,695.97 and 369,296.21 is: 509,584.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,139.90 : 884,695.97 = 369,296.21 : x
  2. Step 2: Convert to fraction form
    641,139.90/884,695.97 = 369,296.21/x
  3. Step 3: Cross multiply
    641,139.90x = 884,695.97 × 369,296.21
  4. Step 4: Simplify right side
    641,139.90x = 326,714,862,453.31
  5. Step 5: Solve for x
    x = 326,714,862,453.31/641,139.90
  6. Step 6: Final answer
    x = 509,584.36

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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.