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Finding the Fourth Proportional to 819,398.88, 1,129,908.24 and 647,030.88

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Solution

The fourth proportional to 819,398.88, 1,129,908.24 and 647,030.88 is: 892,221.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,398.88 : 1,129,908.24 = 647,030.88 : x
  2. Step 2: Convert to fraction form
    819,398.88/1,129,908.24 = 647,030.88/x
  3. Step 3: Cross multiply
    819,398.88x = 1,129,908.24 × 647,030.88
  4. Step 4: Simplify right side
    819,398.88x = 731,085,522,846.45
  5. Step 5: Solve for x
    x = 731,085,522,846.45/819,398.88
  6. Step 6: Final answer
    x = 892,221.77

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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.