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Finding the Fourth Proportional to 607,486.40, 911,229.60 and 408,420.80

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Solution

The fourth proportional to 607,486.40, 911,229.60 and 408,420.80 is: 612,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,486.40 : 911,229.60 = 408,420.80 : x
  2. Step 2: Convert to fraction form
    607,486.40/911,229.60 = 408,420.80/x
  3. Step 3: Cross multiply
    607,486.40x = 911,229.60 × 408,420.80
  4. Step 4: Simplify right side
    607,486.40x = 372,165,122,215.68
  5. Step 5: Solve for x
    x = 372,165,122,215.68/607,486.40
  6. Step 6: Final answer
    x = 612,631.20

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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.