Home / 870,122.40-1,305,183.60-858,312.60

Finding the Fourth Proportional to 870,122.40, 1,305,183.60 and 858,312.60

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Solution

The fourth proportional to 870,122.40, 1,305,183.60 and 858,312.60 is: 1,287,468.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,122.40 : 1,305,183.60 = 858,312.60 : x
  2. Step 2: Convert to fraction form
    870,122.40/1,305,183.60 = 858,312.60/x
  3. Step 3: Cross multiply
    870,122.40x = 1,305,183.60 × 858,312.60
  4. Step 4: Simplify right side
    870,122.40x = 1,120,255,529,193.36
  5. Step 5: Solve for x
    x = 1,120,255,529,193.36/870,122.40
  6. Step 6: Final answer
    x = 1,287,468.90

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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.