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Finding the Fourth Proportional to 543,371.40, 815,020.65 and 144,003.60

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Solution

The fourth proportional to 543,371.40, 815,020.65 and 144,003.60 is: 215,995.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,371.40 : 815,020.65 = 144,003.60 : x
  2. Step 2: Convert to fraction form
    543,371.40/815,020.65 = 144,003.60/x
  3. Step 3: Cross multiply
    543,371.40x = 815,020.65 × 144,003.60
  4. Step 4: Simplify right side
    543,371.40x = 117,365,907,674.34
  5. Step 5: Solve for x
    x = 117,365,907,674.34/543,371.40
  6. Step 6: Final answer
    x = 215,995.74

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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.