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Finding the Fourth Proportional to 543,638.90, 815,394.96 and 144,310.70

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Solution

The fourth proportional to 543,638.90, 815,394.96 and 144,310.70 is: 216,449.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,638.90 : 815,394.96 = 144,310.70 : x
  2. Step 2: Convert to fraction form
    543,638.90/815,394.96 = 144,310.70/x
  3. Step 3: Cross multiply
    543,638.90x = 815,394.96 × 144,310.70
  4. Step 4: Simplify right side
    543,638.90x = 117,670,217,454.07
  5. Step 5: Solve for x
    x = 117,670,217,454.07/543,638.90
  6. Step 6: Final answer
    x = 216,449.22

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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.