Home / 638,979.21-881,777.11-352,499.22

Finding the Fourth Proportional to 638,979.21, 881,777.11 and 352,499.22

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Solution

The fourth proportional to 638,979.21, 881,777.11 and 352,499.22 is: 486,441.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,979.21 : 881,777.11 = 352,499.22 : x
  2. Step 2: Convert to fraction form
    638,979.21/881,777.11 = 352,499.22/x
  3. Step 3: Cross multiply
    638,979.21x = 881,777.11 × 352,499.22
  4. Step 4: Simplify right side
    638,979.21x = 310,825,743,488.85
  5. Step 5: Solve for x
    x = 310,825,743,488.85/638,979.21
  6. Step 6: Final answer
    x = 486,441.09

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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.