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Finding the Fourth Proportional to 278,831, 384,788.58 and 151,506.56

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Solution

The fourth proportional to 278,831, 384,788.58 and 151,506.56 is: 209,080.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,831 : 384,788.58 = 151,506.56 : x
  2. Step 2: Convert to fraction form
    278,831/384,788.58 = 151,506.56/x
  3. Step 3: Cross multiply
    278,831x = 384,788.58 × 151,506.56
  4. Step 4: Simplify right side
    278,831x = 58,297,994,083.08
  5. Step 5: Solve for x
    x = 58,297,994,083.08/278,831
  6. Step 6: Final answer
    x = 209,080.03

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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.