Home / 278,857.36-384,815.40-151,528.72

Finding the Fourth Proportional to 278,857.36, 384,815.40 and 151,528.72

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Solution

The fourth proportional to 278,857.36, 384,815.40 and 151,528.72 is: 209,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,857.36 : 384,815.40 = 151,528.72 : x
  2. Step 2: Convert to fraction form
    278,857.36/384,815.40 = 151,528.72/x
  3. Step 3: Cross multiply
    278,857.36x = 384,815.40 × 151,528.72
  4. Step 4: Simplify right side
    278,857.36x = 58,310,584,998.29
  5. Step 5: Solve for x
    x = 58,310,584,998.29/278,857.36
  6. Step 6: Final answer
    x = 209,105.42

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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.