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Finding the Fourth Proportional to 278,230.82, 417,297.76 and 128,458.31

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Solution

The fourth proportional to 278,230.82, 417,297.76 and 128,458.31 is: 192,665.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,230.82 : 417,297.76 = 128,458.31 : x
  2. Step 2: Convert to fraction form
    278,230.82/417,297.76 = 128,458.31/x
  3. Step 3: Cross multiply
    278,230.82x = 417,297.76 × 128,458.31
  4. Step 4: Simplify right side
    278,230.82x = 53,605,365,016.39
  5. Step 5: Solve for x
    x = 53,605,365,016.39/278,230.82
  6. Step 6: Final answer
    x = 192,665.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.