Home / 858,082.60-1,287,123.90-659,405.80

Finding the Fourth Proportional to 858,082.60, 1,287,123.90 and 659,405.80

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Solution

The fourth proportional to 858,082.60, 1,287,123.90 and 659,405.80 is: 989,108.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,082.60 : 1,287,123.90 = 659,405.80 : x
  2. Step 2: Convert to fraction form
    858,082.60/1,287,123.90 = 659,405.80/x
  3. Step 3: Cross multiply
    858,082.60x = 1,287,123.90 × 659,405.80
  4. Step 4: Simplify right side
    858,082.60x = 848,736,964,978.62
  5. Step 5: Solve for x
    x = 848,736,964,978.62/858,082.60
  6. Step 6: Final answer
    x = 989,108.70

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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.