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Finding the Fourth Proportional to 278,879.52, 384,856.18 and 151,555.10

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Solution

The fourth proportional to 278,879.52, 384,856.18 and 151,555.10 is: 209,147.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,879.52 : 384,856.18 = 151,555.10 : x
  2. Step 2: Convert to fraction form
    278,879.52/384,856.18 = 151,555.10/x
  3. Step 3: Cross multiply
    278,879.52x = 384,856.18 × 151,555.10
  4. Step 4: Simplify right side
    278,879.52x = 58,326,916,845.52
  5. Step 5: Solve for x
    x = 58,326,916,845.52/278,879.52
  6. Step 6: Final answer
    x = 209,147.37

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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.