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Finding the Fourth Proportional to 278,653.60, 384,659.62 and 188,132.12

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Solution

The fourth proportional to 278,653.60, 384,659.62 and 188,132.12 is: 259,701.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,653.60 : 384,659.62 = 188,132.12 : x
  2. Step 2: Convert to fraction form
    278,653.60/384,659.62 = 188,132.12/x
  3. Step 3: Cross multiply
    278,653.60x = 384,659.62 × 188,132.12
  4. Step 4: Simplify right side
    278,653.60x = 72,366,829,788.99
  5. Step 5: Solve for x
    x = 72,366,829,788.99/278,653.60
  6. Step 6: Final answer
    x = 259,701.76

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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.