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Finding the Fourth Proportional to 857,645.60, 1,287,850.80 and 647,520.80

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Solution

The fourth proportional to 857,645.60, 1,287,850.80 and 647,520.80 is: 972,324.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,645.60 : 1,287,850.80 = 647,520.80 : x
  2. Step 2: Convert to fraction form
    857,645.60/1,287,850.80 = 647,520.80/x
  3. Step 3: Cross multiply
    857,645.60x = 1,287,850.80 × 647,520.80
  4. Step 4: Simplify right side
    857,645.60x = 833,910,180,296.64
  5. Step 5: Solve for x
    x = 833,910,180,296.64/857,645.60
  6. Step 6: Final answer
    x = 972,324.91

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1.5x scale

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.