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Finding the Fourth Proportional to 993,169.80, 1,489,754.70 and 520,000.20

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Solution

The fourth proportional to 993,169.80, 1,489,754.70 and 520,000.20 is: 780,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,169.80 : 1,489,754.70 = 520,000.20 : x
  2. Step 2: Convert to fraction form
    993,169.80/1,489,754.70 = 520,000.20/x
  3. Step 3: Cross multiply
    993,169.80x = 1,489,754.70 × 520,000.20
  4. Step 4: Simplify right side
    993,169.80x = 774,672,741,950.94
  5. Step 5: Solve for x
    x = 774,672,741,950.94/993,169.80
  6. Step 6: Final answer
    x = 780,000.30

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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.