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Finding the Fourth Proportional to 278,568.25, 384,428.64 and 151,243.81

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Solution

The fourth proportional to 278,568.25, 384,428.64 and 151,243.81 is: 208,718.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,568.25 : 384,428.64 = 151,243.81 : x
  2. Step 2: Convert to fraction form
    278,568.25/384,428.64 = 151,243.81/x
  3. Step 3: Cross multiply
    278,568.25x = 384,428.64 × 151,243.81
  4. Step 4: Simplify right side
    278,568.25x = 58,142,452,186.72
  5. Step 5: Solve for x
    x = 58,142,452,186.72/278,568.25
  6. Step 6: Final answer
    x = 208,718.88

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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.