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Finding the Fourth Proportional to 543,613.20, 815,419.80 and 538,364.40

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Solution

The fourth proportional to 543,613.20, 815,419.80 and 538,364.40 is: 807,546.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,613.20 : 815,419.80 = 538,364.40 : x
  2. Step 2: Convert to fraction form
    543,613.20/815,419.80 = 538,364.40/x
  3. Step 3: Cross multiply
    543,613.20x = 815,419.80 × 538,364.40
  4. Step 4: Simplify right side
    543,613.20x = 438,992,991,375.12
  5. Step 5: Solve for x
    x = 438,992,991,375.12/543,613.20
  6. Step 6: Final answer
    x = 807,546.60

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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.