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Finding the Fourth Proportional to 543,820.20, 815,730.30 and 188,870.10

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Solution

The fourth proportional to 543,820.20, 815,730.30 and 188,870.10 is: 283,305.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,820.20 : 815,730.30 = 188,870.10 : x
  2. Step 2: Convert to fraction form
    543,820.20/815,730.30 = 188,870.10/x
  3. Step 3: Cross multiply
    543,820.20x = 815,730.30 × 188,870.10
  4. Step 4: Simplify right side
    543,820.20x = 154,067,063,334.03
  5. Step 5: Solve for x
    x = 154,067,063,334.03/543,820.20
  6. Step 6: Final answer
    x = 283,305.15

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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.