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Finding the Fourth Proportional to 858,783.80, 1,287,074.10 and 479,703.80

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Solution

The fourth proportional to 858,783.80, 1,287,074.10 and 479,703.80 is: 718,940.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,783.80 : 1,287,074.10 = 479,703.80 : x
  2. Step 2: Convert to fraction form
    858,783.80/1,287,074.10 = 479,703.80/x
  3. Step 3: Cross multiply
    858,783.80x = 1,287,074.10 × 479,703.80
  4. Step 4: Simplify right side
    858,783.80x = 617,414,336,651.58
  5. Step 5: Solve for x
    x = 617,414,336,651.58/858,783.80
  6. Step 6: Final answer
    x = 718,940.36

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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.