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Finding the Fourth Proportional to 873,708.28, 1,205,756.22 and 491,759.80

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Solution

The fourth proportional to 873,708.28, 1,205,756.22 and 491,759.80 is: 678,650.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,708.28 : 1,205,756.22 = 491,759.80 : x
  2. Step 2: Convert to fraction form
    873,708.28/1,205,756.22 = 491,759.80/x
  3. Step 3: Cross multiply
    873,708.28x = 1,205,756.22 × 491,759.80
  4. Step 4: Simplify right side
    873,708.28x = 592,942,437,595.96
  5. Step 5: Solve for x
    x = 592,942,437,595.96/873,708.28
  6. Step 6: Final answer
    x = 678,650.36

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Double scale
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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.