Home / 858,137.10-1,287,205.65-659,460.30

Finding the Fourth Proportional to 858,137.10, 1,287,205.65 and 659,460.30

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Solution

The fourth proportional to 858,137.10, 1,287,205.65 and 659,460.30 is: 989,190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,137.10 : 1,287,205.65 = 659,460.30 : x
  2. Step 2: Convert to fraction form
    858,137.10/1,287,205.65 = 659,460.30/x
  3. Step 3: Cross multiply
    858,137.10x = 1,287,205.65 × 659,460.30
  4. Step 4: Simplify right side
    858,137.10x = 848,861,024,110.70
  5. Step 5: Solve for x
    x = 848,861,024,110.70/858,137.10
  6. Step 6: Final answer
    x = 989,190.45

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Double scale
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Similar ratio
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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.