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Finding the Fourth Proportional to 438,936.40, 658,404.60 and 434,270.80

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Solution

The fourth proportional to 438,936.40, 658,404.60 and 434,270.80 is: 651,406.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,936.40 : 658,404.60 = 434,270.80 : x
  2. Step 2: Convert to fraction form
    438,936.40/658,404.60 = 434,270.80/x
  3. Step 3: Cross multiply
    438,936.40x = 658,404.60 × 434,270.80
  4. Step 4: Simplify right side
    438,936.40x = 285,925,892,365.68
  5. Step 5: Solve for x
    x = 285,925,892,365.68/438,936.40
  6. Step 6: Final answer
    x = 651,406.20

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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.