Home / 638,734.80-958,102.20-427,227.60

Finding the Fourth Proportional to 638,734.80, 958,102.20 and 427,227.60

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Solution

The fourth proportional to 638,734.80, 958,102.20 and 427,227.60 is: 640,841.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,734.80 : 958,102.20 = 427,227.60 : x
  2. Step 2: Convert to fraction form
    638,734.80/958,102.20 = 427,227.60/x
  3. Step 3: Cross multiply
    638,734.80x = 958,102.20 × 427,227.60
  4. Step 4: Simplify right side
    638,734.80x = 409,327,703,460.72
  5. Step 5: Solve for x
    x = 409,327,703,460.72/638,734.80
  6. Step 6: Final answer
    x = 640,841.40

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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.