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Finding the Fourth Proportional to 278,851.68, 384,814.56 and 151,527.72

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Solution

The fourth proportional to 278,851.68, 384,814.56 and 151,527.72 is: 209,107.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,851.68 : 384,814.56 = 151,527.72 : x
  2. Step 2: Convert to fraction form
    278,851.68/384,814.56 = 151,527.72/x
  3. Step 3: Cross multiply
    278,851.68x = 384,814.56 × 151,527.72
  4. Step 4: Simplify right side
    278,851.68x = 58,310,072,899.60
  5. Step 5: Solve for x
    x = 58,310,072,899.60/278,851.68
  6. Step 6: Final answer
    x = 209,107.84

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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.