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Finding the Fourth Proportional to 653,481.20, 978,909.60 and 372,670.40

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Solution

The fourth proportional to 653,481.20, 978,909.60 and 372,670.40 is: 558,257.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,481.20 : 978,909.60 = 372,670.40 : x
  2. Step 2: Convert to fraction form
    653,481.20/978,909.60 = 372,670.40/x
  3. Step 3: Cross multiply
    653,481.20x = 978,909.60 × 372,670.40
  4. Step 4: Simplify right side
    653,481.20x = 364,810,632,195.84
  5. Step 5: Solve for x
    x = 364,810,632,195.84/653,481.20
  6. Step 6: Final answer
    x = 558,257.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.