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Finding the Fourth Proportional to 278,876.01, 384,851.34 and 151,551.60

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Solution

The fourth proportional to 278,876.01, 384,851.34 and 151,551.60 is: 209,142.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,876.01 : 384,851.34 = 151,551.60 : x
  2. Step 2: Convert to fraction form
    278,876.01/384,851.34 = 151,551.60/x
  3. Step 3: Cross multiply
    278,876.01x = 384,851.34 × 151,551.60
  4. Step 4: Simplify right side
    278,876.01x = 58,324,836,339.14
  5. Step 5: Solve for x
    x = 58,324,836,339.14/278,876.01
  6. Step 6: Final answer
    x = 209,142.54

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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.