Home / 853,899.80-1,279,812.90-380,082.20

Finding the Fourth Proportional to 853,899.80, 1,279,812.90 and 380,082.20

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Solution

The fourth proportional to 853,899.80, 1,279,812.90 and 380,082.20 is: 569,661.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,899.80 : 1,279,812.90 = 380,082.20 : x
  2. Step 2: Convert to fraction form
    853,899.80/1,279,812.90 = 380,082.20/x
  3. Step 3: Cross multiply
    853,899.80x = 1,279,812.90 × 380,082.20
  4. Step 4: Simplify right side
    853,899.80x = 486,434,102,620.38
  5. Step 5: Solve for x
    x = 486,434,102,620.38/853,899.80
  6. Step 6: Final answer
    x = 569,661.81

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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.