Home / 858,720.80-1,286,979.60-479,640.80

Finding the Fourth Proportional to 858,720.80, 1,286,979.60 and 479,640.80

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Solution

The fourth proportional to 858,720.80, 1,286,979.60 and 479,640.80 is: 718,845.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,720.80 : 1,286,979.60 = 479,640.80 : x
  2. Step 2: Convert to fraction form
    858,720.80/1,286,979.60 = 479,640.80/x
  3. Step 3: Cross multiply
    858,720.80x = 1,286,979.60 × 479,640.80
  4. Step 4: Simplify right side
    858,720.80x = 617,287,924,927.68
  5. Step 5: Solve for x
    x = 617,287,924,927.68/858,720.80
  6. Step 6: Final answer
    x = 718,845.90

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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.