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Finding the Fourth Proportional to 458,571.40, 687,273.90 and 408,416.20

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Solution

The fourth proportional to 458,571.40, 687,273.90 and 408,416.20 is: 612,104.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,571.40 : 687,273.90 = 408,416.20 : x
  2. Step 2: Convert to fraction form
    458,571.40/687,273.90 = 408,416.20/x
  3. Step 3: Cross multiply
    458,571.40x = 687,273.90 × 408,416.20
  4. Step 4: Simplify right side
    458,571.40x = 280,693,794,597.18
  5. Step 5: Solve for x
    x = 280,693,794,597.18/458,571.40
  6. Step 6: Final answer
    x = 612,104.89

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1.5x scale

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.