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Finding the Fourth Proportional to 278,453.72, 384,266.51 and 151,129.31

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Solution

The fourth proportional to 278,453.72, 384,266.51 and 151,129.31 is: 208,558.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,453.72 : 384,266.51 = 151,129.31 : x
  2. Step 2: Convert to fraction form
    278,453.72/384,266.51 = 151,129.31/x
  3. Step 3: Cross multiply
    278,453.72x = 384,266.51 × 151,129.31
  4. Step 4: Simplify right side
    278,453.72x = 58,073,929,835.43
  5. Step 5: Solve for x
    x = 58,073,929,835.43/278,453.72
  6. Step 6: Final answer
    x = 208,558.65

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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.