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Finding the Fourth Proportional to 543,661.40, 815,492.10 and 485,600.60

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Solution

The fourth proportional to 543,661.40, 815,492.10 and 485,600.60 is: 728,400.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,661.40 : 815,492.10 = 485,600.60 : x
  2. Step 2: Convert to fraction form
    543,661.40/815,492.10 = 485,600.60/x
  3. Step 3: Cross multiply
    543,661.40x = 815,492.10 × 485,600.60
  4. Step 4: Simplify right side
    543,661.40x = 396,003,453,055.26
  5. Step 5: Solve for x
    x = 396,003,453,055.26/543,661.40
  6. Step 6: Final answer
    x = 728,400.90

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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.