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Finding the Fourth Proportional to 543,820.40, 815,730.60 and 539,883.80

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Solution

The fourth proportional to 543,820.40, 815,730.60 and 539,883.80 is: 809,825.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,820.40 : 815,730.60 = 539,883.80 : x
  2. Step 2: Convert to fraction form
    543,820.40/815,730.60 = 539,883.80/x
  3. Step 3: Cross multiply
    543,820.40x = 815,730.60 × 539,883.80
  4. Step 4: Simplify right side
    543,820.40x = 440,399,736,104.28
  5. Step 5: Solve for x
    x = 440,399,736,104.28/543,820.40
  6. Step 6: Final answer
    x = 809,825.70

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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.