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Finding the Fourth Proportional to 857,653.60, 1,287,862.80 and 647,528.80

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Solution

The fourth proportional to 857,653.60, 1,287,862.80 and 647,528.80 is: 972,336.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,653.60 : 1,287,862.80 = 647,528.80 : x
  2. Step 2: Convert to fraction form
    857,653.60/1,287,862.80 = 647,528.80/x
  3. Step 3: Cross multiply
    857,653.60x = 1,287,862.80 × 647,528.80
  4. Step 4: Simplify right side
    857,653.60x = 833,928,253,448.64
  5. Step 5: Solve for x
    x = 833,928,253,448.64/857,653.60
  6. Step 6: Final answer
    x = 972,336.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.