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Finding the Fourth Proportional to 278,453.92, 384,266.62 and 151,129.48

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Solution

The fourth proportional to 278,453.92, 384,266.62 and 151,129.48 is: 208,558.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,453.92 : 384,266.62 = 151,129.48 : x
  2. Step 2: Convert to fraction form
    278,453.92/384,266.62 = 151,129.48/x
  3. Step 3: Cross multiply
    278,453.92x = 384,266.62 × 151,129.48
  4. Step 4: Simplify right side
    278,453.92x = 58,074,014,461.96
  5. Step 5: Solve for x
    x = 58,074,014,461.96/278,453.92
  6. Step 6: Final answer
    x = 208,558.80

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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.