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Finding the Fourth Proportional to 280,992.39, 387,772.56 and 153,665.25

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Solution

The fourth proportional to 280,992.39, 387,772.56 and 153,665.25 is: 212,059.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,992.39 : 387,772.56 = 153,665.25 : x
  2. Step 2: Convert to fraction form
    280,992.39/387,772.56 = 153,665.25/x
  3. Step 3: Cross multiply
    280,992.39x = 387,772.56 × 153,665.25
  4. Step 4: Simplify right side
    280,992.39x = 59,587,167,375.54
  5. Step 5: Solve for x
    x = 59,587,167,375.54/280,992.39
  6. Step 6: Final answer
    x = 212,059.72

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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.