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Finding the Fourth Proportional to 278,697.40, 384,598.26 and 151,371.88

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Solution

The fourth proportional to 278,697.40, 384,598.26 and 151,371.88 is: 208,890.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,697.40 : 384,598.26 = 151,371.88 : x
  2. Step 2: Convert to fraction form
    278,697.40/384,598.26 = 151,371.88/x
  3. Step 3: Cross multiply
    278,697.40x = 384,598.26 × 151,371.88
  4. Step 4: Simplify right side
    278,697.40x = 58,217,361,660.93
  5. Step 5: Solve for x
    x = 58,217,361,660.93/278,697.40
  6. Step 6: Final answer
    x = 208,890.94

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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.