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Finding the Fourth Proportional to 520,697.18, 780,892.67 and 221,175.38

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Solution

The fourth proportional to 520,697.18, 780,892.67 and 221,175.38 is: 331,698.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,697.18 : 780,892.67 = 221,175.38 : x
  2. Step 2: Convert to fraction form
    520,697.18/780,892.67 = 221,175.38/x
  3. Step 3: Cross multiply
    520,697.18x = 780,892.67 × 221,175.38
  4. Step 4: Simplify right side
    520,697.18x = 172,714,228,016.12
  5. Step 5: Solve for x
    x = 172,714,228,016.12/520,697.18
  6. Step 6: Final answer
    x = 331,698.03

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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.