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Finding the Fourth Proportional to 911,179.26, 1,257,419.88 and 497,716.38

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Solution

The fourth proportional to 911,179.26, 1,257,419.88 and 497,716.38 is: 686,844.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,179.26 : 1,257,419.88 = 497,716.38 : x
  2. Step 2: Convert to fraction form
    911,179.26/1,257,419.88 = 497,716.38/x
  3. Step 3: Cross multiply
    911,179.26x = 1,257,419.88 × 497,716.38
  4. Step 4: Simplify right side
    911,179.26x = 625,838,470,813.63
  5. Step 5: Solve for x
    x = 625,838,470,813.63/911,179.26
  6. Step 6: Final answer
    x = 686,844.51

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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.