Home / 398,450.25-549,895.91-219,636.81

Finding the Fourth Proportional to 398,450.25, 549,895.91 and 219,636.81

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Solution

The fourth proportional to 398,450.25, 549,895.91 and 219,636.81 is: 303,117.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,450.25 : 549,895.91 = 219,636.81 : x
  2. Step 2: Convert to fraction form
    398,450.25/549,895.91 = 219,636.81/x
  3. Step 3: Cross multiply
    398,450.25x = 549,895.91 × 219,636.81
  4. Step 4: Simplify right side
    398,450.25x = 120,777,382,406.26
  5. Step 5: Solve for x
    x = 120,777,382,406.26/398,450.25
  6. Step 6: Final answer
    x = 303,117.85

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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.