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Finding the Fourth Proportional to 543,729.20, 815,593.80 and 144,431.60

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Solution

The fourth proportional to 543,729.20, 815,593.80 and 144,431.60 is: 216,647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,729.20 : 815,593.80 = 144,431.60 : x
  2. Step 2: Convert to fraction form
    543,729.20/815,593.80 = 144,431.60/x
  3. Step 3: Cross multiply
    543,729.20x = 815,593.80 × 144,431.60
  4. Step 4: Simplify right side
    543,729.20x = 117,797,517,484.08
  5. Step 5: Solve for x
    x = 117,797,517,484.08/543,729.20
  6. Step 6: Final answer
    x = 216,647.40

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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.