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Finding the Fourth Proportional to 543,269.57, 815,071.21 and 259,322.45

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Solution

The fourth proportional to 543,269.57, 815,071.21 and 259,322.45 is: 389,063.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,269.57 : 815,071.21 = 259,322.45 : x
  2. Step 2: Convert to fraction form
    543,269.57/815,071.21 = 259,322.45/x
  3. Step 3: Cross multiply
    543,269.57x = 815,071.21 × 259,322.45
  4. Step 4: Simplify right side
    543,269.57x = 211,366,258,378.00
  5. Step 5: Solve for x
    x = 211,366,258,378.00/543,269.57
  6. Step 6: Final answer
    x = 389,063.32

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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.