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Finding the Fourth Proportional to 278,699.52, 384,608.16 and 151,377.60

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Solution

The fourth proportional to 278,699.52, 384,608.16 and 151,377.60 is: 208,902.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,699.52 : 384,608.16 = 151,377.60 : x
  2. Step 2: Convert to fraction form
    278,699.52/384,608.16 = 151,377.60/x
  3. Step 3: Cross multiply
    278,699.52x = 384,608.16 × 151,377.60
  4. Step 4: Simplify right side
    278,699.52x = 58,221,060,201.22
  5. Step 5: Solve for x
    x = 58,221,060,201.22/278,699.52
  6. Step 6: Final answer
    x = 208,902.62

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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.