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Finding the Fourth Proportional to 548,138.40, 822,207.60 and 423,568.80

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Solution

The fourth proportional to 548,138.40, 822,207.60 and 423,568.80 is: 635,353.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,138.40 : 822,207.60 = 423,568.80 : x
  2. Step 2: Convert to fraction form
    548,138.40/822,207.60 = 423,568.80/x
  3. Step 3: Cross multiply
    548,138.40x = 822,207.60 × 423,568.80
  4. Step 4: Simplify right side
    548,138.40x = 348,261,486,482.88
  5. Step 5: Solve for x
    x = 348,261,486,482.88/548,138.40
  6. Step 6: Final answer
    x = 635,353.20

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Similar ratio
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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.