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Finding the Fourth Proportional to 278,813.72, 384,754.38 and 151,486.58

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Solution

The fourth proportional to 278,813.72, 384,754.38 and 151,486.58 is: 209,046.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,813.72 : 384,754.38 = 151,486.58 : x
  2. Step 2: Convert to fraction form
    278,813.72/384,754.38 = 151,486.58/x
  3. Step 3: Cross multiply
    278,813.72x = 384,754.38 × 151,486.58
  4. Step 4: Simplify right side
    278,813.72x = 58,285,125,166.22
  5. Step 5: Solve for x
    x = 58,285,125,166.22/278,813.72
  6. Step 6: Final answer
    x = 209,046.83

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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.