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Finding the Fourth Proportional to 993,855.72, 1,489,617.18 and 520,763.88

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Solution

The fourth proportional to 993,855.72, 1,489,617.18 and 520,763.88 is: 780,534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,855.72 : 1,489,617.18 = 520,763.88 : x
  2. Step 2: Convert to fraction form
    993,855.72/1,489,617.18 = 520,763.88/x
  3. Step 3: Cross multiply
    993,855.72x = 1,489,617.18 × 520,763.88
  4. Step 4: Simplify right side
    993,855.72x = 775,738,822,371.46
  5. Step 5: Solve for x
    x = 775,738,822,371.46/993,855.72
  6. Step 6: Final answer
    x = 780,534.65

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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.