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Finding the Fourth Proportional to 489,940.40, 734,910.60 and 406,996.40

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Solution

The fourth proportional to 489,940.40, 734,910.60 and 406,996.40 is: 610,494.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,940.40 : 734,910.60 = 406,996.40 : x
  2. Step 2: Convert to fraction form
    489,940.40/734,910.60 = 406,996.40/x
  3. Step 3: Cross multiply
    489,940.40x = 734,910.60 × 406,996.40
  4. Step 4: Simplify right side
    489,940.40x = 299,105,968,521.84
  5. Step 5: Solve for x
    x = 299,105,968,521.84/489,940.40
  6. Step 6: Final answer
    x = 610,494.60

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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.