Home / 853,896.30-1,279,807.65-380,078.70

Finding the Fourth Proportional to 853,896.30, 1,279,807.65 and 380,078.70

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Solution

The fourth proportional to 853,896.30, 1,279,807.65 and 380,078.70 is: 569,656.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,896.30 : 1,279,807.65 = 380,078.70 : x
  2. Step 2: Convert to fraction form
    853,896.30/1,279,807.65 = 380,078.70/x
  3. Step 3: Cross multiply
    853,896.30x = 1,279,807.65 × 380,078.70
  4. Step 4: Simplify right side
    853,896.30x = 486,427,627,862.06
  5. Step 5: Solve for x
    x = 486,427,627,862.06/853,896.30
  6. Step 6: Final answer
    x = 569,656.56

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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.