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Finding the Fourth Proportional to 858,791.80, 1,287,086.10 and 479,711.80

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Solution

The fourth proportional to 858,791.80, 1,287,086.10 and 479,711.80 is: 718,952.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,791.80 : 1,287,086.10 = 479,711.80 : x
  2. Step 2: Convert to fraction form
    858,791.80/1,287,086.10 = 479,711.80/x
  3. Step 3: Cross multiply
    858,791.80x = 1,287,086.10 × 479,711.80
  4. Step 4: Simplify right side
    858,791.80x = 617,430,389,785.98
  5. Step 5: Solve for x
    x = 617,430,389,785.98/858,791.80
  6. Step 6: Final answer
    x = 718,952.36

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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.