Home / 781,189.86-1,171,579.74-331,679.34

Finding the Fourth Proportional to 781,189.86, 1,171,579.74 and 331,679.34

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Solution

The fourth proportional to 781,189.86, 1,171,579.74 and 331,679.34 is: 497,431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,189.86 : 1,171,579.74 = 331,679.34 : x
  2. Step 2: Convert to fraction form
    781,189.86/1,171,579.74 = 331,679.34/x
  3. Step 3: Cross multiply
    781,189.86x = 1,171,579.74 × 331,679.34
  4. Step 4: Simplify right side
    781,189.86x = 388,588,794,920.57
  5. Step 5: Solve for x
    x = 388,588,794,920.57/781,189.86
  6. Step 6: Final answer
    x = 497,431.95

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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.