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Finding the Fourth Proportional to 543,653.40, 815,480.10 and 485,592.60

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Solution

The fourth proportional to 543,653.40, 815,480.10 and 485,592.60 is: 728,388.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,653.40 : 815,480.10 = 485,592.60 : x
  2. Step 2: Convert to fraction form
    543,653.40/815,480.10 = 485,592.60/x
  3. Step 3: Cross multiply
    543,653.40x = 815,480.10 × 485,592.60
  4. Step 4: Simplify right side
    543,653.40x = 395,991,102,007.26
  5. Step 5: Solve for x
    x = 395,991,102,007.26/543,653.40
  6. Step 6: Final answer
    x = 728,388.90

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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.