Home / 639,340.72-882,285.85-352,860.80

Finding the Fourth Proportional to 639,340.72, 882,285.85 and 352,860.80

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Solution

The fourth proportional to 639,340.72, 882,285.85 and 352,860.80 is: 486,945.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,340.72 : 882,285.85 = 352,860.80 : x
  2. Step 2: Convert to fraction form
    639,340.72/882,285.85 = 352,860.80/x
  3. Step 3: Cross multiply
    639,340.72x = 882,285.85 × 352,860.80
  4. Step 4: Simplify right side
    639,340.72x = 311,324,090,859.68
  5. Step 5: Solve for x
    x = 311,324,090,859.68/639,340.72
  6. Step 6: Final answer
    x = 486,945.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.