Home / 278,643.11-384,645.21-188,121.69

Finding the Fourth Proportional to 278,643.11, 384,645.21 and 188,121.69

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Solution

The fourth proportional to 278,643.11, 384,645.21 and 188,121.69 is: 259,687.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,643.11 : 384,645.21 = 188,121.69 : x
  2. Step 2: Convert to fraction form
    278,643.11/384,645.21 = 188,121.69/x
  3. Step 3: Cross multiply
    278,643.11x = 384,645.21 × 188,121.69
  4. Step 4: Simplify right side
    278,643.11x = 72,360,106,250.15
  5. Step 5: Solve for x
    x = 72,360,106,250.15/278,643.11
  6. Step 6: Final answer
    x = 259,687.40

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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.